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First-draft release notes for 9.5.2. 

As usual, the release notes for other branches will be made by cutting
these down, but put them up for community review first.
This commit is contained in:
Tom Lane 2016-03-26 19:27:58 -04:00
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doc/src/sgml/release-9.5.sgml
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<!-- doc/src/sgml/release-9.5.sgml -->
<!-- See header comment in release.sgml about typical markup -->
<sect1 id="release-9-5-2">
<title>Release 9.5.2</title>
<note>
<title>Release Date</title>
<simpara>2016-03-31</simpara>
</note>
<para>
This release contains a variety of fixes from 9.5.1.
For information about new features in the 9.5 major release, see
<xref linkend="release-9-5">.
</para>
<sect2>
<title>Migration to Version 9.5.2</title>
<para>
A dump/restore is not required for those running 9.5.X.
</para>
<para>
However, you may need to <command>REINDEX</> some indexes after applying
the update, as per the first changelog entry below.
</para>
</sect2>
<sect2>
<title>Changes</title>
<itemizedlist>
<!--
Author: Robert Haas <rhaas@postgresql.org>
Branch: master [3df9c374e] 2016-03-23 16:03:13 -0400
Branch: REL9_5_STABLE [8aa6e9780] 2016-03-23 16:04:35 -0400
-->
<listitem>
<para>
Disable abbreviated keys for string sorting in non-<literal>C</>
locales (Robert Haas)
</para>
<para>
<productname>PostgreSQL</> 9.5 introduced logic for speeding up
comparisons of string data types by using the standard C library
function <function>strxfrm()</> as a substitute
for <function>strcoll()</>. It now emerges that most versions of
glibc (Linux's implementation of the C library) have buggy
implementations of <function>strxfrm()</> that, in some locales,
can produce string comparison results that do not
match <function>strcoll()</>. Until this problem can be better
characterized, disable the optimization in all non-<literal>C</>
locales. (<literal>C</> locale is safe since it uses
neither <function>strcoll()</> nor <function>strxfrm()</>.)
</para>
<para>
Unfortunately, this problem affects not only sorting but also entry
ordering in b-tree indexes, which means that b-tree indexes
on <type>text</>, <type>varchar</>, or <type>char</> columns may now
be corrupt if they sort according to an affected locale and were
built or modified under <productname>PostgreSQL</> 9.5.0 or 9.5.1.
Users should <command>REINDEX</> indexes that might be affected.
</para>
<para>
It is not possible at this time to give an exhaustive list of
known-affected locales. <literal>C</> locale is known safe, and
there is no evidence of trouble in English-based locales such
as <literal>en_US</>, but some other popular locales such
as <literal>de_DE</> are affected in most glibc versions.
</para>
</listitem>
<!--
Author: Simon Riggs <simon@2ndQuadrant.com>
Branch: master [c7111d11b] 2016-03-03 09:53:43 +0000
Branch: REL9_5_STABLE [bf7ced5e2] 2016-03-03 09:50:38 +0000
-->
<listitem>
<para>
Fix incorrect handling of indexed <literal>ROW()</> comparisons
(Simon Riggs)
</para>
<para>
Flaws in a minor optimization introduced in 9.5 caused incorrect
results if the <literal>ROW()</> comparison matches the index ordering
partially but not exactly (for example, differing column order, or the
index contains both <literal>ASC</> and <literal>DESC</> columns).
Pending a better solution, the optimization has been removed.
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [a298a1e06] 2016-03-09 14:51:22 -0500
Branch: REL9_5_STABLE [b2ce9485b] 2016-03-09 14:51:01 -0500
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Branch: REL9_3_STABLE [1ab7a160f] 2016-03-09 14:51:01 -0500
Branch: REL9_2_STABLE [c8e059724] 2016-03-09 14:51:01 -0500
Branch: REL9_1_STABLE [d485d9581] 2016-03-09 14:51:02 -0500
-->
<listitem>
<para>
Fix incorrect handling of NULL index entries in
indexed <literal>ROW()</> comparisons (Tom Lane)
</para>
<para>
An index search using a row comparison such as <literal>ROW(a, b) &gt;
ROW('x', 'y')</> would stop upon reaching a NULL entry in
the <structfield>b</> column, ignoring the fact that there might be
non-NULL <structfield>b</> values associated with later values
of <structfield>a</>.
</para>
</listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [1d4a0ab19] 2016-03-09 18:53:53 -0800
Branch: REL9_5_STABLE [301cc3549] 2016-03-09 18:53:53 -0800
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Branch: REL9_2_STABLE [ce8f42919] 2016-03-09 18:53:54 -0800
Branch: REL9_1_STABLE [a62714fae] 2016-03-09 18:53:54 -0800
Branch: master [606e0f984] 2016-03-09 18:53:53 -0800
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Branch: REL9_2_STABLE [c224d44f7] 2016-03-09 18:53:54 -0800
Branch: REL9_1_STABLE [d0e47bcd4] 2016-03-09 18:53:54 -0800
-->
<listitem>
<para>
Avoid unlikely data-loss scenarios due to renaming files without
adequate <function>fsync()</> calls before and after (Michael Paquier,
Tomas Vondra, Andres Freund)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [71404af2a] 2016-03-22 17:56:20 -0400
Branch: REL9_5_STABLE [d8d5a00b1] 2016-03-22 17:56:06 -0400
-->
<listitem>
<para>
Fix incorrect behavior when rechecking a just-modified row in a query
that does <command>SELECT FOR UPDATE/SHARE</> and contains some
relations that need not be locked (Tom Lane)
</para>
<para>
Rows from non-locked relations were incorrectly treated as containing
all NULLs during the recheck, which could result in incorrectly
deciding that the updated row no longer passes the <literal>WHERE</>
condition, or in incorrectly outputting NULLs.
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [a9d199f6d] 2016-03-02 23:31:39 -0500
Branch: REL9_5_STABLE [429d68465] 2016-03-02 23:31:39 -0500
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-->
<listitem>
<para>
Fix bug in <function>json_to_record()</> when a field of its input
object contains a sub-object with a field name matching one of the
requested output column names (Tom Lane)
</para>
</listitem>
<!--
Author: Andrew Dunstan <andrew@dunslane.net>
Branch: master [94c745eb1] 2016-02-21 10:30:49 -0500
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-->
<listitem>
<para>
Fix nonsense result from two-argument form
of <function>jsonb_object()</> when called with empty arrays
(Michael Paquier, Andrew Dunstan)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [384dfbde1] 2016-03-23 10:43:13 -0400
Branch: REL9_5_STABLE [5f95521b3] 2016-03-23 10:43:24 -0400
-->
<listitem>
<para>
Fix misbehavior in <function>jsonb_set()</> when converting a path
array element into an integer for use as an array subscript
(Michael Paquier)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [55c3a04d6] 2016-03-17 15:50:33 -0400
Branch: REL9_5_STABLE [d0a585c69] 2016-03-17 15:50:33 -0400
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-->
<listitem>
<para>
Fix misformatting of negative time zone offsets
by <function>to_char()</>'s <literal>OF</> format code
(Thomas Munro, Tom Lane)
</para>
</listitem>
<!--
Author: Stephen Frost <sfrost@snowman.net>
Branch: master [fd658dbb3] 2016-03-15 18:04:39 -0400
Branch: REL9_5_STABLE [3f14d8d59] 2016-03-15 18:04:48 -0400
-->
<listitem>
<para>
Fix possible incorrect logging of waits done by
<command>INSERT ... ON CONFLICT</> (Peter Geoghegan)
</para>
<para>
Log messages would sometimes claim that the wait was due to an
exclusion constraint although no such constraint was responsible.
</para>
</listitem>
<!--
Author: Fujii Masao <fujii@postgresql.org>
Branch: master [d34794f7d] 2016-03-06 02:29:04 +0900
Branch: REL9_5_STABLE [f95f1ce00] 2016-03-06 02:43:17 +0900
Branch: REL9_4_STABLE [a9613ee69] 2016-03-06 02:43:26 +0900
-->
<listitem>
<para>
Ignore <xref linkend="recovery-min-apply-delay"> parameter until
recovery has reached a consistent state (Michael Paquier)
</para>
<para>
Previously, standby servers would delay application of WAL records in
response to <varname>recovery_min_apply_delay</> even while replaying
the initial portion of WAL needed to make their database state valid.
Since the standby is useless until it's reached a consistent database
state, this was deemed unhelpful.
</para>
</listitem>
<!--
Author: Simon Riggs <simon@2ndQuadrant.com>
Branch: master [481725c0b] 2016-02-19 08:31:12 +0000
Branch: REL9_5_STABLE [c479024d3] 2016-02-19 08:31:39 +0000
Branch: REL9_4_STABLE [6830cae5f] 2016-02-19 08:32:28 +0000
Branch: REL9_3_STABLE [71e3cff2e] 2016-02-19 08:33:33 +0000
Branch: REL9_2_STABLE [c063d3c43] 2016-02-19 08:33:52 +0000
Branch: REL9_1_STABLE [ca32f125b] 2016-02-19 08:35:02 +0000
-->
<listitem>
<para>
Correctly handle wraparound cases in the <literal>pg_subtrans</>
startup logic for hot standby (Jeff Janes)
</para>
</listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [c8f621c43] 2016-03-05 18:02:20 -0800
Branch: REL9_5_STABLE [5990a034a] 2016-03-05 18:02:20 -0800
Branch: REL9_4_STABLE [3b94b3a49] 2016-03-05 18:02:20 -0800
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Branch: master [b63bea5fd] 2016-03-07 14:24:03 -0800
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Branch: REL9_4_STABLE [e3e84fd35] 2016-03-07 14:24:58 -0800
Author: Andres Freund <andres@anarazel.de>
Branch: master [0bda14d54] 2016-03-05 18:02:20 -0800
Branch: REL9_5_STABLE [e76e365be] 2016-03-05 18:02:20 -0800
Branch: REL9_4_STABLE [a50f50a65] 2016-03-05 18:02:20 -0800
Author: Andres Freund <andres@anarazel.de>
Branch: master [d9e903f3c] 2016-03-05 18:02:20 -0800
Branch: REL9_5_STABLE [6e759cefe] 2016-03-05 18:02:20 -0800
Branch: REL9_4_STABLE [465dd92d9] 2016-03-05 18:02:20 -0800
Author: Andres Freund <andres@anarazel.de>
Branch: master [7c17aac69] 2016-03-02 23:42:21 -0800
Branch: REL9_5_STABLE [f8a75881f] 2016-03-02 23:43:42 -0800
-->
<listitem>
<para>
Fix assorted bugs in logical decoding (Andres Freund)
</para>
<para>
Trouble cases included tuples larger than one page when replica
identity is <literal>FULL</>, <command>UPDATE</>s that change a
primary key in a transaction large enough to be spooled to disk,
incorrect reports of <quote>subxact logged without previous toplevel
record</>, and incorrect reporting of a transaction's commit time.
</para>
</listitem>
<!--
Author: Dean Rasheed <dean.a.rasheed@gmail.com>
Branch: master [41fedc246] 2016-02-29 12:28:06 +0000
Branch: REL9_5_STABLE [f1dfcf63d] 2016-02-29 12:31:25 +0000
Branch: REL9_4_STABLE [9b69d5c1d] 2016-02-29 12:34:33 +0000
-->
<listitem>
<para>
Fix planner error with nested security barrier views when the outer
view has a <literal>WHERE</> clause containing a correlated subquery
(Dean Rasheed)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [ab4ff2889] 2016-03-13 16:44:31 -0400
Branch: REL9_5_STABLE [aa9c4e71c] 2016-03-13 16:44:10 -0400
-->
<listitem>
<para>
Fix memory leak in GIN index searches (Tom Lane)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [907e4dd2b] 2016-02-28 23:39:20 -0500
Branch: REL9_5_STABLE [2d43c45e9] 2016-02-28 23:40:04 -0500
Branch: REL9_4_STABLE [80c925c7b] 2016-02-28 23:40:13 -0500
Branch: REL9_3_STABLE [0c4457de8] 2016-02-28 23:40:21 -0500
Branch: REL9_2_STABLE [47792639c] 2016-02-28 23:40:28 -0500
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-->
<listitem>
<para>
Fix corner-case crash due to trying to free <function>localeconv()</>
output strings more than once (Tom Lane)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [b3e05097e] 2016-03-06 19:20:55 -0500
Branch: REL9_5_STABLE [c2d61adc3] 2016-03-06 19:21:03 -0500
Branch: REL9_4_STABLE [3fa4715c5] 2016-03-06 19:21:03 -0500
Branch: REL9_3_STABLE [a35f85a52] 2016-03-06 19:21:03 -0500
Branch: REL9_2_STABLE [8894c9f79] 2016-03-06 19:21:03 -0500
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-->
<listitem>
<para>
Fix parsing of affix files for <literal>ispell</> dictionaries
(Tom Lane)
</para>
<para>
The code could go wrong if the affix file contained any characters
whose byte length changes during case-folding, for
example <literal>I</> in Turkish UTF8 locales.
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [51e78ab4f] 2016-02-10 19:30:11 -0500
Branch: REL9_5_STABLE [b10635bb5] 2016-02-10 19:30:11 -0500
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-->
<listitem>
<para>
Avoid use of <function>sscanf()</> to parse <literal>ispell</>
dictionary files (Artur Zakirov)
</para>
<para>
This dodges a portability problem on FreeBSD-derived platforms
(including OS X).
</para>
</listitem>
<!--
Author: Noah Misch <noah@leadboat.com>
Branch: master [5882ca668] 2016-02-19 22:47:50 -0500
Branch: REL9_5_STABLE [377a1af56] 2016-02-19 22:48:04 -0500
-->
<listitem>
<para>
Fix atomic-operations code used on PPC with IBM's xlc compiler
(Noah Misch)
</para>
<para>
This error led to rare failures of concurrent operations on that
platform.
</para>
</listitem>
<!--
Author: Magnus Hagander <magnus@hagander.net>
Branch: master [9d9038824] 2016-03-10 14:10:18 +0100
Branch: REL9_5_STABLE [ad9a15d3f] 2016-03-10 14:10:32 +0100
Branch: REL9_4_STABLE [8857488b6] 2016-03-10 14:10:41 +0100
Branch: REL9_3_STABLE [270d8a12e] 2016-03-10 14:10:48 +0100
Branch: REL9_2_STABLE [78b597808] 2016-03-10 14:10:54 +0100
Branch: REL9_1_STABLE [3e6385e27] 2016-03-10 14:11:01 +0100
-->
<listitem>
<para>
Avoid a crash on old Windows versions (before 7SP1/2008R2SP1) with an
AVX2-capable CPU and a Postgres build done with Visual Studio 2013
(Christian Ullrich)
</para>
<para>
This is a workaround for a bug in Visual Studio 2013's runtime
library, which Microsoft have stated they will not fix in that
version.
</para>
</listitem>
<!--
Author: Robert Haas <rhaas@postgresql.org>
Branch: master [9445db925] 2016-03-04 11:53:20 -0500
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-->
<listitem>
<para>
Fix <application>psql</>'s tab completion logic to handle multibyte
characters properly (Kyotaro Horiguchi, Robert Haas)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: REL9_5_STABLE [1bee54e51] 2016-03-14 11:31:22 -0400
Branch: REL9_4_STABLE [13108dd0e] 2016-03-14 11:31:34 -0400
Branch: REL9_3_STABLE [0576de5c7] 2016-03-14 11:31:39 -0400
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-->
<listitem>
<para>
Fix <application>psql</>'s tab completion after
<literal>SECURITY LABEL</> (Tom Lane)
</para>
<para>
Pressing TAB after <literal>SECURITY LABEL</> might cause a crash
or offering of inappropriate keywords.
</para>
</listitem>
<!--
Author: Noah Misch <noah@leadboat.com>
Branch: master [2ffa86962] 2016-02-10 20:34:02 -0500
Branch: REL9_5_STABLE [725f0ce29] 2016-02-10 20:34:24 -0500
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-->
<listitem>
<para>
Make <application>pg_ctl</> accept a wait timeout from the
<envar>PGCTLTIMEOUT</> environment variable, if none is specified on
the command line (Noah Misch)
</para>
<para>
This eases testing of slower buildfarm members by allowing them
to globally specify a longer-than-normal timeout for postmaster
startup and shutdown.
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [b642e50ae] 2016-03-07 10:40:44 -0500
Branch: REL9_5_STABLE [45b87cc57] 2016-03-07 10:40:53 -0500
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-->
<listitem>
<para>
Fix incorrect test for Windows service status
in <application>pg_ctl</> (Manuel Mathar)
</para>
<para>
The previous set of minor releases attempted to
fix <application>pg_ctl</> to properly determine whether to send log
messages to Window's Event Log, but got the test backwards.
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [47211af17] 2016-03-16 23:18:07 -0400
Branch: REL9_5_STABLE [8ee2e5f78] 2016-03-16 23:18:07 -0400
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Branch: REL9_1_STABLE [1965a8ce1] 2016-03-16 23:18:08 -0400
-->
<listitem>
<para>
Fix <application>pgbench</> to correctly handle the combination
of <literal>-C</> and <literal>-M prepared</> options (Tom Lane)
</para>
</listitem>
<!--
Author: Bruce Momjian <bruce@momjian.us>
Branch: master [3386f34cd] 2016-02-18 18:32:27 -0500
Branch: REL9_5_STABLE [6f43c4d34] 2016-02-18 18:32:26 -0500
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-->
<listitem>
<para>
In <application>pg_upgrade</>, skip creating a deletion script when
the new data directory is inside the old data directory (Bruce
Momjian)
</para>
<para>
Blind application of the script in such cases would result in loss of
the new data directory.
</para>
</listitem>
<!--
Author: Andres Freund <andres@anarazel.de>
Branch: master [e66197fa2] 2016-03-08 13:42:57 -0800
Branch: REL9_5_STABLE [68dababfe] 2016-03-08 13:42:58 -0800
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-->
<listitem>
<para>
In PL/Perl, properly translate empty Postgres arrays into empty Perl
arrays (Alex Hunsaker)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [66f503868] 2016-02-16 21:08:15 -0500
Branch: REL9_5_STABLE [2ce19f8a5] 2016-02-16 21:08:15 -0500
Branch: REL9_4_STABLE [f461fa7d0] 2016-02-16 21:08:15 -0500
Branch: REL9_3_STABLE [b3ec98c8b] 2016-02-16 21:08:15 -0500
Branch: REL9_2_STABLE [7d48349fd] 2016-02-16 21:08:15 -0500
Branch: REL9_1_STABLE [875973f5d] 2016-02-16 21:08:15 -0500
-->
<listitem>
<para>
Make PL/Python cope with function names that aren't valid Python
identifiers (Jim Nasby)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [48e6c943e] 2016-02-18 15:40:35 -0500
Branch: REL9_5_STABLE [0276bbd62] 2016-02-18 15:40:35 -0500
Branch: REL9_4_STABLE [b7547166f] 2016-02-18 15:40:35 -0500
Branch: REL9_3_STABLE [9dfb5b940] 2016-02-18 15:40:35 -0500
Branch: REL9_2_STABLE [29f299728] 2016-02-18 15:40:35 -0500
Branch: REL9_1_STABLE [0f359c7de] 2016-02-18 15:40:36 -0500
-->
<listitem>
<para>
Fix multiple mistakes in the statistics returned
by <filename>contrib/pgstattuple</>'s <function>pgstatindex()</>
function (Tom Lane)
</para>
</listitem>
<!--
Author: Andrew Dunstan <andrew@dunslane.net>
Branch: master [5d0320105] 2016-03-19 18:36:35 -0400
Branch: REL9_5_STABLE [2f38b3e7d] 2016-03-19 18:44:04 -0400
Branch: REL9_4_STABLE [6336ca916] 2016-03-19 18:49:19 -0400
Branch: REL9_3_STABLE [a0adf3852] 2016-03-19 18:51:01 -0400
Branch: REL9_2_STABLE [89bf78a9b] 2016-03-19 18:51:01 -0400
Branch: REL9_1_STABLE [2aa9fd963] 2016-03-19 18:59:41 -0400
-->
<listitem>
<para>
Remove dependency on <literal>psed</> in MSVC builds, since it's no
longer provided by core Perl (Michael Paquier, Andrew Dunstan)
</para>
</listitem>
<!--
Author: Tom Lane <tgl@sss.pgh.pa.us>
Branch: master [676265eb7] 2016-03-25 19:03:08 -0400
Branch: REL9_5_STABLE [31d02ebf7] 2016-03-25 19:03:24 -0400
Branch: REL9_4_STABLE [de371e68a] 2016-03-25 19:03:32 -0400
Branch: REL9_3_STABLE [8e16592d4] 2016-03-25 19:03:39 -0400
Branch: REL9_2_STABLE [96fa37459] 2016-03-25 19:03:47 -0400
Branch: REL9_1_STABLE [e5fd35cc5] 2016-03-25 19:03:54 -0400
-->
<listitem>
<para>
Update time zone data files to <application>tzdata</> release 2016c
for DST law changes in Azerbaijan, Chile, Haiti, Palestine, and Russia
(Altai, Astrakhan, Kirov, Sakhalin, Ulyanovsk regions), plus
historical corrections for Lithuania, Moldova, and Russia
(Kaliningrad, Samara, Volgograd).
</para>
</listitem>
</itemizedlist>
</sect2>
</sect1>
<sect1 id="release-9-5-1">
<title>Release 9.5.1</title>