mod_negotiation: quality values are now parsed independent from

the current locale. level values are now really parsed as integers.

PR: 17564
Reviewed by: Dirk-Willem van Gulik


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98964 13f79535-47bb-0310-9956-ffa450edef68