*) mod_rewrite: Catch an edge case, where strange subsequent RewriteRules
   could lead to a 400 (Bad Request) response.

Submitted by: Andr�� Malo
Reviewed by: jerenkrantz, rederpj


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/APACHE_2_0_BRANCH@102500 13f79535-47bb-0310-9956-ffa450edef68