This allows it to be used on Windows without installing mingw
(though you do still need 'diff'), and opens the door to future
improvements such as message localization.
Magnus Hagander and Tom Lane.
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