ibrcommon: Split getnpop() of the queue into take() and poll()
ibrdtn: Use take() and poll() methods of the queue instead of getnpop()
daemon: Use take() and poll() methods of the queue instead of getnpop()
ibrcommon: Remove dead code of Queue and make empty() and size() const
ibrcommon: Fix queue limitation handling when using exclusive locking
ibrcommon: Add comparison operator to refcnt_ptr and remove getPointer() methods
ibrcommon: down() method of refcnt_ptr restructured
ibrdtn: Get rid of refcnt_ptr::getPointer() usage
daemon: Get rid of refcnt_ptr::getPointer() usage