Prevent the server from crashing when entering infinite loops. The

new LimitInternalRecursion directive configures limits of subsequent
internal redirects and nested subrequests, after which the request
will be aborted.
[William Rowe, Jeff Trawick, Andr� Malo]

PR: 19753 (and probably others)


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@99911 13f79535-47bb-0310-9956-ffa450edef68