Correct request header handling of whitespace with the new possible config of

HttpProtocolOptions Unsafe StrictWhitespace

I have elected not to preserve any significance to excess whitespace in the
now-deprecated obs-fold code path, that's certainly open for discussion.

This can be reviewed by tweaking t/conf/extra.conf to switch Strict to Unsafe.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1756847 13f79535-47bb-0310-9956-ffa450edef68