Merge r1686085 from trunk:

*) mod_ext_filter, mod_charset_lite: Avoid inadvertent filtering of protocol
   data during read of chunked request bodies. PR 58049. 
   [Edward Lu <Chaosed0 gmail.com>]

Submitted By: Edward Lu <Chaosed0 gmail.com>


Submitted by: covener
Reviewed/backported by: jim


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1686272 13f79535-47bb-0310-9956-ffa450edef68