SECURITY: CVE-2017-7679 (cve.mitre.org)

      mod_mime can read one byte past the end of a buffer when sending a
malicious Content-Type response header.

Merge r1797550 from trunk:
mod_mime: fix quoted pair scanning

Submitted By: ylavic


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1799235 13f79535-47bb-0310-9956-ffa450edef68