bug_10591 - update regex to require one or more spaces (changed from zer...

bug_10591 - update regex to require one or more spaces (changed from zero or more) between the status code and the reason code.

RFC2616 says
Status-Line = HTTP-Version SP Status-Code SP Reason-Phrase CRLF

http://grokbase.com/t/apache/dev/085mz81ecq/empty-reason-phrase-bz-44995-45092
Reason-Phrase = *<TEXT, excluding CR, LF>
This seems to imply that the Reason-Phrase can be empty.

Updated test cases to catch any regressions if the regex is changed at this point again.