Improve handling of getaddrinfo() on AIX (Tom)

This fixes a problem with starting the statistics collector, among other things.

Fix pg_restore to handle a tar-format backup that contains large objects (blobs) with comments (Tom)

Fix “failed to re-find parent key” errors in VACUUM (Tom)

Clean out pg_internal.init cache files during server restart (Simon)

This avoids a hazard that the cache files might contain stale data after PITR recovery.

Fix race condition for truncation of a large relation across a gigabyte boundary by VACUUM (Tom)

Fix bug causing needless deadlock errors on row-level locks (Tom)

Fix bugs affecting multi-gigabyte hash indexes (Tom)

Fix possible deadlock in Windows signal handling (Teodor)

Fix error when constructing an ARRAY[] made up of multiple empty elements (Tom)

Fix ecpg memory leak during connection (Michael)

Fix for Darwin (OS X) compilation (Tom)

to_number() and to_char(numeric) are now STABLE, not IMMUTABLE, for new initdb installs (Tom)

This is because lc_numeric can potentially change the output of these functions.

Improve index usage of regular expressions that use parentheses (Tom)

This improves psql \d performance also.

Update timezone database

This affects Australian and Canadian daylight-savings rules in particular.