Add message-switch.0.10.4

Signed-off-by: David Scott <dave.scott@citrix.com>
message-switch.0.10.4 needs at least cohttp.0.10.0

Signed-off-by: David Scott <dave.scott@citrix.com>
Merge pull request #2766 from djs55/message-switch

Add message-switch.0.10.4