cubicweb-mercurial-server #2447411 Enable multiple mercurial-server servers [open]

Some instance configuration variables needs to be moved into a MercurialServerConfig entity type.

The fs_lock stuff needs to be changed into a CM : it was only a global lock but we need one lock per MercurialServerConfig

prioritynormal
typeenhancement
done in<not specified>
closed by<not specified>