Make an editorial pass over the 9.4 release notes.

Update the notes to include commits through today, and do a lot of
wordsmithing and markup adjustment.  Notably, don't use <link> where <xref>
will do; since we got rid of the text-format HISTORY file, there is no
longer a reason to avoid <xref>.
This commit is contained in:
Tom Lane 2014-08-17 22:26:44 -04:00
parent 259904ecd4
commit f66faadc44

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