pgsql: Revert getaddrinfo configure changes until we get a solution

Log Message:
-----------

Revert getaddrinfo configure changes until we get a solution that is
properly tested on Tru64 - pre recent discussion (or lack thereof) on -hackers.

Modified Files:
--------------
    pgsql:
        configure (r1.485 -> r1.486)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.diff?r1=1.485&r2=1.486)
        configure.in (r1.455 -> r1.456)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/configure.in.diff?r1=1.455&r2=1.456)