Merge r1213338:

Limit length of lines in .htaccess to 8K again, to reduce DoS potential.
Make ap_varbuf_cfg_getline() strictly enforce the max_len parameter.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.4.x@1213344 13f79535-47bb-0310-9956-ffa450edef68