First survey results, all intrinsicly bad input will be logged at the debug

level, no louder. This patch intentionally dodges the Limit* constrained tests
since administrators may shoot themselves in the foot, or be confronted with
impossibly long cookie values, etc.

Adjust the documentation to match.



git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1757920 13f79535-47bb-0310-9956-ffa450edef68