configure: Do not treat dependency exceptions with --enable-modules

of only 'few' or 'none' as fatal, but continue the ./configure

Submitted by: trawick
Backports: r1396440 [only the acinclude.m4, config5.m4 change was N/A]
Reviewed by: wrowe, rpluem, ylavic



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1750254 13f79535-47bb-0310-9956-ffa450edef68