Let src/Configure be aware of CFLAGS options starting with plus

signs as it's the case for the HP/UX's compiler.

Submitted by: Doug Yatcilla <yatcilda@umdnj.edu>
Reviewed by: Ralf S. Engelschall
PR: 3681


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@82678 13f79535-47bb-0310-9956-ffa450edef68