reflect backport of mod_deflate.c r1.31

change directive from compressionlevel to deflatecompressionlevel

PR:
Obtained from:
Submitted by:	Ian Holsman, Andre Malo
Reviewed by:


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@98982 13f79535-47bb-0310-9956-ffa450edef68