Http10 decoder bug

There is a little bug I found in the Status-Line parser code.

HTTP/1.0 was not detected correctly.

The other issue was where a buggy web server returned no Reason-Phrase that resulted in a ProtocolException.

Both should be fixed, tested with GET against 100 different .de domains along with following redirects.

(See buggy web server: http://www.westfalia.de/)