Add a method of disconnecting idle connections.
Include config.h in unixsocketconnection.cc.
Don't try to remove a static pointer to read-only memory as given by
strerror.
Only terminate connections if a timeout larger than 0 has been set.
Otherwise we'll end up terminating all new connections immediately.
Merge branch 'master' of github.com:tonnerre/libsiot

Conflicts:
	configure.ac
	server.cc
	unixsocketconnection.cc