Fix bug in mod_deflate that unconditionally sent deflate'd output even when

Accept-Encoding is not present.

Reported by Roy Fielding for http://cvs.apache.org/viewcvs/ with Safari.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@103803 13f79535-47bb-0310-9956-ffa450edef68