add two scenarios, one with a single, global database and one with
multiple project databases and usher as proxy; add an option for additional
command line options for the mtn process; remove the protocol type
configuration option - we're handling this implicit with the new
mtn_remote_url configuration
* Monotone.php: add the IDF user for ssh:// URIs; add support for remote_stdio
and rework the command line stitching
1fd1e63043