Correct the parser construction for several optimizations,

Correct the parser construction for several optimizations,
based on the fact that bad whitespace shall not be permitted
or corrected in any operating mode, while preserving the
ability to extract bad method/uri/proto for later reporting
and diagnostics.

This change causes badwhitespace in the request line or any
request field line to always fail, and not honor the setting
of the HttpProtocolOptions Unsafe option. Mult SP characters
or trailing SP characters in the request line are still
permitted in Unsafe mode.

Adjusted several error message emits to match these changes.

git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1758263 13f79535-47bb-0310-9956-ffa450edef68