HTTP/1.x 200
instead of
    HTTP/1.x 200 OK

Also reformatted the whole module with 4 spaces and no tabs.

(1) No longer close self.sock; close it on close().  (Guido)

(2) Don't use regular expressions for what can be done simply with
string.split() -- regex is thread unsafe.  (Jeremy)

(3) Delete unused imports.  (Jeremy)