Backport r819480 from trunk.

* include/httpd.h: Fix comment implying that LimitRequestLine 
  and LimitRequestFieldsize cannot raise limits -- no longer the
  case.

Committed By: jorton
Reviewed By: covener, ylavic, trawick


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x@1678697 13f79535-47bb-0310-9956-ffa450edef68