pgsql: Stamp release 7.4.8.

Log Message:
-----------
Stamp release 7.4.8.

Tags:
----
REL7_4_STABLE

Modified Files:
--------------
    pgsql:
        configure (r1.310.2.15 -> r1.310.2.16)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.310.2.15&r2=1.310.2.16)
        configure.in (r1.301.2.13 -> r1.301.2.14)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.301.2.13&r2=1.301.2.14)
    pgsql/doc:
        bug.template (r1.21.6.9 -> r1.21.6.10)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/bug.template.diff?r1=1.21.6.9&r2=1.21.6.10)
    pgsql/doc/src/sgml:
        release.sgml (r1.235.2.29 -> r1.235.2.30)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/doc/src/sgml/release.sgml.diff?r1=1.235.2.29&r2=1.235.2.30)
    pgsql/src/include:
        pg_config.h.win32 (r1.11.4.8 -> r1.11.4.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/include/pg_config.h.win32.diff?r1=1.11.4.8&r2=1.11.4.9)
    pgsql/src/interfaces/libpq:
        libpq.rc (r1.10.4.7 -> r1.10.4.8)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/libpq/libpq.rc.diff?r1=1.10.4.7&r2=1.10.4.8)