Another 2% improvement that's been queued waiting for the lowercase

issues to be resolved.  This is "NULL-compression" for invoke_handler()
similar to what happened in run_method() ages ago.  This helps the
server scale when more modules are added.

Submitted by:   Dmitry Khrustalev <dima@bog.msu.su>

Oh yeah and some CHANGES cleanup.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@80499 13f79535-47bb-0310-9956-ffa450edef68