Backport:

mod_mime: Don't arbitrarily bypass AddOutputFilter during a ProxyPass,
but then allow AddOutputFilter during a RewriteRule [P]. Make mod_mime
behave identically in both cases. PR52342.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1222643 13f79535-47bb-0310-9956-ffa450edef68