for testing PLs and contrib_regression for testing contrib, instead of
overwriting the core system's regression database as formerly done.
Andrew Dunstan
"make pgxs install by default". It is up to the committers to chose.
(1) there is only one "install" target. no more "install-all-headers".
it simplifies/changes several makefiles.
(2) the documentation reflects the change.
(3) a minor fix on pgxs to use a nicer patch without a double slash.
Fabien Coelho
Bruce Momjian
Tom Lane
Peter Eisentraut