pgsql: Stamp release 7.4.19.

Log Message:
-----------
Stamp release 7.4.19.

Security: CVE-2007-4769, CVE-2007-4772, CVE-2007-6067, CVE-2007-6600, CVE-2007-6601

Tags:
----
REL7_4_STABLE

Modified Files:
--------------
    pgsql:
        configure (r1.310.2.29 -> r1.310.2.30)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure?r1=1.310.2.29&r2=1.310.2.30)
        configure.in (r1.301.2.28 -> r1.301.2.29)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in?r1=1.301.2.28&r2=1.301.2.29)
    pgsql/doc:
        bug.template (r1.21.6.21 -> r1.21.6.22)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/bug.template?r1=1.21.6.21&r2=1.21.6.22)
    pgsql/src/include:
        pg_config.h.win32 (r1.11.4.19 -> r1.11.4.20)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.win32?r1=1.11.4.19&r2=1.11.4.20)
    pgsql/src/interfaces/libpq:
        libpq.rc (r1.10.4.18 -> r1.10.4.19)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/libpq.rc?r1=1.10.4.18&r2=1.10.4.19)