This is reverting previous patch for this bug and fixes it with
a different approach. The previous patch had regression, instead
of freezing evolution on quit it crashed it when there was pending
addressbook lookups.
em_utils_connect_service_sync() and em_utils_disconnect_service_sync()
are no longer needed. CamelService itself now effectively does what
these functions were doing.
These libraries are bound for E-D-S so they live at the lowest layer of
Evolution for now -- even libeutil can link to them (but please don't).
This is the first step toward moving mail handing to a D-Bus service.
