Merge r1774288 from trunk:

short-circuit some kinds of looping in RewriteRule.

PR60478

Submitted By: Jeff Wheelouse <apache wheelhouse.org>
Committed By: covener



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1774352 13f79535-47bb-0310-9956-ffa450edef68