Make ./configure behave nicer in the presence of old Apache.
Make ./configure behave nicer in the presence of old Apache.

* build/ac-macros/svn-apache.m4: If an old httpd is discovered, but --with-apxs
    was not explictly specified, then just warn, don't error out.


git-svn-id: f8a4e5e023278da1e04e203c7fe051e3c4285d88@850748 13f79535-47bb-0310-9956-ffa450edef68

YueLinHo/Subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion,wbond/subversion,wbond/subversion,wbond/subversion,wbond/subversion,YueLinHo/Subversion,YueLinHo/Subversion