Log Message:
Import libunique-1.0.4 as x11/libunique.

Unique is a library for writing single instance application. If you launch a
single instance application twice, the second instance will either just quit or
will send a message to the running instance.

Unique makes it easy to write this kind of applications, by providing a base
class, taking care of all the IPC machinery needed to send messages to a
running instance, and also handling the startup notification side.

Unique aims to replace the BaconMessageConnection code that has been copied by
many projects and the code using Bonobo and D-Bus.