Added default limits for various aspects of reading a

client request to avoid some simple denial of service attacks,
including limits on maximum request-line size, number of header
fields, size of any one header field, and size of the request
message body.

Bumped MMN for addition of limit_req_line, limit_req_fields,
limit_req_fieldsize and limit_req_body variables to server_rec.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81882 13f79535-47bb-0310-9956-ffa450edef68