* anders/diameter/19.1/OTP-13838:
  vsn -> 1.12.1
  Update appup for 19.1
  Fix xmllint errors in documentation
  Remove documentation overkill
  Don't run traffic tests in parallel when {string_decode, true}
  Remove copyright from generated dictionary modules
  Fix dictionary function typo
  Fix dictionary typo in relay example

* anders/diameter/failover/OTP-13412:
  Make peer failover more efficient

* anders/diameter/min_heap_size/OTP-13796:
  Let unfortunate min_heap_size setting be disabled

* anders/diameter/19/listen/OTP-13787:
  Close listening sockets at service death

OTP-13412 more efficient peer failover
OTP-13787 close listening sockets
OTP-13796 min_heap_size
OTP-13838 typo in diameter_traffic

No load order requirements.

The setting in all diameter server processes has existed since the
beginning of time. Whether it's actually useful is questionable, but it
does lead to increased memory usage, especially if there are many peer
connections whose processes wouldn't otherwise be large. Let the setting
be disabled with -diameter min_heap_size false. (Or any value that isn't
a non-negative integer.)

The diameter application itself only calls
diameter_lib:spawn_opts(server, []), but let other arguments remain for
backwards compatibility, since diameter_lib:spawn_opts/2 has been abused
from outside of diameter.

The SCPT stack has a different behavior in solaris2.10 then in later versions
and linux. Diameter implementation does not support this behavior.