2.6.2 (stable):

* slot: Handle auto-disconnection when a slot contains a slot
  (Kjell Ahlstedt) Bug #755003 (Ryan Beasley)
* slot and signal: Correct move constructors and move assignments.
  (Kjell Ahlstedt) Bug #756484.
* trackable, slot_base, signal_base, connection: Add some noexcept specs
  (Kjell Ahlstedt) Bug #756484.
* trackable, slot, signal: Remove noexcept from move operations.
  (Kjell Ahlstedt) Bug #756484.
* slot and signal: Add missing move constructors and move assignments
  (Kjell Ahlstedt) Bug #756484.
* signal_impl: =delete copy and move operations.
  (Murray Cumming, Kjell Ahlstedt) Bug #756484
* typed_slot_rep: =delete unimplemented copy and move operations.
  (Murray Cumming, Kjell Ahlstedt) Bug #756484
* slot_rep: =delete copy and move operations.
 (Murray Cumming, Kjell Ahlstedt) Bug #756484