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_0_STABLE

Modified Files:
--------------
    pgsql:
        configure (r1.424.4.28 -> r1.424.4.29)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.424.4.28&r2=1.424.4.29)
        configure.in (r1.398.4.29 -> r1.398.4.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.398.4.29&r2=1.398.4.30)
    pgsql/doc:
        bug.template (r1.26.4.22 -> r1.26.4.23)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/bug.template?r1=1.26.4.22&r2=1.26.4.23)
    pgsql/doc/src/sgml:
        installation.sgml (r1.228.4.1 -> r1.228.4.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/installation.sgml?r1=1.228.4.1&r2=1.228.4.2)
        problems.sgml (r2.19.4.1 -> r2.19.4.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/problems.sgml?r1=2.19.4.1&r2=2.19.4.2)