Log Message:
geography/mapserver: Rototill dependencies and options

Adjust dependencies to cmake's status output about what was
configured, sorted how cmake sorts them.  Drop gd and readline as not
mentioned and apparently not in the sources.

Drop Xpm option as apparently not in the sources.

Enable fastcgi by default, as it's small and my guess is that most
mapserver users would want it.

Enable pgsql (postgis) by default, as my guess is that most mapserver
users would want it; that's the normal place to store the data that
one would query via WFS.