databases/postgresql*-*: Update to latest version

The PostgreSQL Global Development Group has released an update to all
supported versions of PostgreSQL, including 18.2, 17.8, 16.12, 15.16,
and 14.21. This release fixes 5 security vulnerabilities and over 65
bugs reported over the last several months.

Release notes:
https://www.postgresql.org/about/news/postgresql-182-178-1612-1516-and-1421-released-3235/
https://www.postgresql.org/docs/release/

Security:
CVE-2026-2003: PostgreSQL oidvector discloses a few bytes of memory
CVE-2026-2004: PostgreSQL intarray missing validation of type of input to
selectivity estimator executes arbitrary code
CVE-2026-2005: PostgreSQL pgcrypto heap buffer overflow executes arbitrary code
CVE-2026-2006: PostgreSQL missing validation of multibyte character length
executes arbitrary code
CVE-2026-2007: PostgreSQL pg_trgm heap buffer overflow writes pattern onto
server memory

Remove postgresql13* since it is now EoL.

*/*: Remove redundant '-*' from CONFLICTS definitions

The conflict checks compare the patterns first against the package
names without version (as reported by "pkg query "%n"), then - if
there was no match - agsinst the full package names including the
version (as reported by "pkg query "%n-%v").

Approved by: portmgr (blanket)

*/*: Remove redundant '-[0-9]*' from CONFLICTS

The conflict checks compare the patterns first against the package
names without version (as reported by "pkg query "%n"), then - if
there was no match - agsinst the full package names including the
version (as reported by "pkg query "%n-%v").

Many CONFLICTS definitions used patterns like "bash-[0-9]*" to filter
for the bash package in any version. But that pattern is functionally
identical with just "bash".

Approved by:	portmgr (blanket)

One more small cleanup, forgotten yesterday.
Reported by:	lwhsu

Remove # $FreeBSD$ from Makefiles.

Welcome PostgreSQL 13

Release notes:	https://www.postgresql.org/about/news/2077/