SEDFILTER has several anomolies; first, it's not SED syntax,

but more mod-rewrite like (and using the rewrite pcre parser).
Secondly, 'FILTER' in the filter name is redundant.  Simplify,
by renaming this 'REWRITE' filter.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@569204 13f79535-47bb-0310-9956-ffa450edef68