slightly better handling of persistent connections
slightly better handling of persistent connections

Now server will accept queueing requests from a client as any compliant
http 1.1 compliant will. However it will still process them serially.

Drup/ocaml-cohttp,inhabitedtype/ocaml-cohttp,mor1/ocaml-cohttp,Drup/ocaml-cohttp,fdopen/ocaml-cohttp,marklrh/ocaml-cohttp,mor1/ocaml-cohttp,Drup/ocaml-cohttp,inhabitedtype/ocaml-cohttp,edwintorok/ocaml-cohttp,marklrh/ocaml-cohttp,dsheets/ocaml-cohttp,marklrh/ocaml-cohttp,dsheets/ocaml-cohttp,inhabitedtype/ocaml-cohttp,dsheets/ocaml-cohttp,edwintorok/ocaml-cohttp,edwintorok/ocaml-cohttp,mor1/ocaml-cohttp,fdopen/ocaml-cohttp,fdopen/ocaml-cohttp