* anders/diameter/dialyzer/OTP-13400:
  Fix dialyzer warnings

* anders/diameter/17.5.6.9/OTP-13385:
  vsn -> 1.9.2.4
  Update appup for 17.5.6.9

* anders/diameter/retransmission/OTP-13342:
  Fix handling of shared peer connections in watchdog state SUSPECT
  Remove unnecessary parentheses
  Remove dead export

Whether making record declarations unreadable to compensate for
dialyzer's ignorance of match specs is worth it is truly debatable.

OTP-13342 remote watchdog transition to state SUSPECT

A peer connection shared from a remote node was regarded as being
available for peer selection (aka up) as long as its peer_fsm process
was alive; that is, for the lifetime of the peer connection. In
particular, it didn't take note of transitions into watchdog state
SUSPECT, when the connection remains. As a result, retransmissions could
select the same peer connection whose watchdog transition caused the
retransmission.

A service process now broadcasts a peer_down event just as it
does a peer_up event.

The fault predates the table rearrangements of commit 8fd4e5f4.

Not needed as of commit 6c9cbd96.

The export of diameter_traffic:failover/1 happened with the creation of
the module in commit e49e7acc, but was never needed since the calling
code was also moved into diameter_traffic.