Transform the configure message "You need root priviledges for suEXEC" from a

fatal error into a (more friendly) warning because the building ("make") of
Apache we can allow, of course. Root priviledges are needed only for the
installation step ("make install"). So make sure the user is aware of this
fact but let him proceed as long as he can.

PR: 2288


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81371 13f79535-47bb-0310-9956-ffa450edef68