(an omapi manager).
overhaul of way connection locking is done.
clarified/fixed where connections can get disconnected.
omapi_value_asint renamed to omapi_value_getint (because
omapi_value_assstr was amusing but in questionable taste)
don't require an object in an OMAPI_OP_UPDATE message; thus the
message can be used just for notification. (though arguably
OMAPI_OP_STATUS can be used, with a bit more effort.)
free the notify_object if it exists.
signal the notify_object with "status" in preference to the value object.
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