These patches make Configure create src/include/ap_config.h and they also

clean up the various autoconf symbol clashes I was getting.  I bumped the
MODULE_MAGIC_NUMBER so an external module will now that it can expect to
find ap_config.h after today.  The patches have been tested on
Solaris 2.5.1 and a generic Linux 2.1.79 box both with and without the
external module compiled in.  Nothing here should affect anybody, but
it allows people to correctly build external modules outside of the
Apache build environment.

Reviewed by: Concept ok'ed, at least in part, by Jim and Dean


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80418 13f79535-47bb-0310-9956-ffa450edef68