Merge r561840, r561902, r561906, r561918 from trunk:

Merge r561840, r561902, r561906, r561918 from trunk:

Some updates to the RewriteRule docs, mostly focusing on clearly
describing what can be in the substitution string. Included is
a description of how mod_rewrite decides whether to treat the
substitution as a file-system or URL-path.

PR: 22529

R flag to mod_rewrite can set any status code

PR: 25917

Note the L doesn't necessarily mean no more rewriting.

PR: 40004

Change the flag list to a <dl> instead of <ul>. Seems much more readable to me.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@562107 13f79535-47bb-0310-9956-ffa450edef68