Create extension infrastructure for the core procedural languages.

This mostly just involves creating control, install, and
update-from-unpackaged scripts for them.  However, I had to adjust plperl
and plpython to not share the same support functions between variants,
because we can't put the same function into multiple extensions.

catversion bump forced due to new contents of pg_pltemplate, and because
initdb now installs plpgsql as an extension not a bare language.

Add support for regression testing these as extensions not bare
languages.

Fix a couple of other issues that popped up while testing this: my initial
hack at pg_dump binary-upgrade support didn't work right, and we don't want
an extra schema permissions test after all.

Documentation changes still to come, but I'm committing now to see
whether the MSVC build scripts need work (likely they do).

1 files changed, 2 insertions, 1 deletions

diff --git a/src/pl/plpython/expected/plpython_drop.out b/src/pl/plpython/expected/plpython_drop.out
index fef642f7c0..a0e3b5c4ef 100644
--- a/src/pl/plpython/expected/plpython_drop.out
+++ b/src/pl/plpython/expected/plpython_drop.out
@@ -2,4 +2,5 @@
 -- For paranoia's sake, don't leave an untrusted language sitting around
 --
 SET client_min_messages = WARNING;
-DROP PROCEDURAL LANGUAGE plpythonu CASCADE;
+DROP EXTENSION plpythonu CASCADE;
+DROP EXTENSION IF EXISTS plpython2u CASCADE;