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_1_STABLE

Modified Files:
--------------
    pgsql:
        configure (r1.461.2.29 -> r1.461.2.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.461.2.29&r2=1.461.2.30)
        configure.in (r1.431.2.29 -> r1.431.2.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.431.2.29&r2=1.431.2.30)
    pgsql/doc:
        bug.template (r1.34.2.16 -> r1.34.2.17)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/bug.template?r1=1.34.2.16&r2=1.34.2.17)
    pgsql/doc/src/sgml:
        installation.sgml (r1.249 -> r1.249.2.1)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml?r1=1.249&r2=1.249.2.1)
        problems.sgml (r2.24 -> r2.24.2.1)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/problems.sgml?r1=2.24&r2=2.24.2.1)