Add mysql_protocol v0.9
Merge remote-tracking branch 'upstream/master'
Merge branch 'master' of git://github.com/slegrand45/opam-repository
mysql_protocol: restrict to ocaml4+ (see #1172)
mysql_protocol.0.8: also restrict to ocaml 4+
Merge pull request #1212 from mirage/master

mysql_protocol.0.9