Backports: r1352911

Submitted by: sf
Make sure that a triggering LimitRequestFieldSize is always logged, even if the
first read already exeeds the limit and ap_rgetline does not return a header
name.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/2.2.x-merge-http-strict@1775710 13f79535-47bb-0310-9956-ffa450edef68