Fix negotiation type parsing to be strict about "*", "*/*" and "type/*"

comparisons.

Submitted by: wrowe, Robert Święcki <robert swiecki.net>
Backports: r1800917
Reviewed by: wrowe, jchampion, ylavic



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1800963 13f79535-47bb-0310-9956-ffa450edef68