pgsql: Remove references to pgsql-ports and pgsql-patches mailing lists

Log Message:
-----------
Remove references to pgsql-ports and pgsql-patches mailing lists from
various documentation, since those lists are now dead/deprecated.
Point to pgsql-bugs and/or pgsql-hackers as appropriate.

Tags:
----
REL8_3_STABLE

Modified Files:
--------------
pgsql:
configure (r1.578.2.11 -> r1.578.2.12)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.578.2.11&r2=1.578.2.12)
configure.in (r1.546.2.9 -> r1.546.2.10)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.546.2.9&r2=1.546.2.10)
pgsql/contrib/pg_standby:
pg_standby.c (r1.10.2.2 -> r1.10.2.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/contrib/pg_standby/pg_standby.c?r1=1.10.2.2&r2=1.10.2.3)
pgsql/doc:
bug.template (r1.49.2.5 -> r1.49.2.6)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/bug.template?r1=1.49.2.5&r2=1.49.2.6)
pgsql/doc/src/sgml:
installation.sgml (r1.300.2.2 -> r1.300.2.3)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml?r1=1.300.2.2&r2=1.300.2.3)
problems.sgml (r2.28 -> r2.28.2.1)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/problems.sgml?r1=2.28&r2=2.28.2.1)