This patch adds basic ratelimiting to sending out AckPackets
and non AckPackets. This provides a basic way to prevent
aprsd from sending out packets as fast as possible, which isn't
great for a bandwidth limited network.
This patch also adds some keepalive checks to all threads in the
threadslist as well as the network client objects (apris, kiss)
This patch decouples sending a message from the internals of
the Packet classes. This allows the rest of the code to use
Packet objects as type hints in methods to enforce Packets
in the plugins.
The send method was moved to a single place in the threads.tx.send()
This patch reworks all the packet processing to use the new
Packets objects. Nuked all of the messaging classes.
backwards incompatible changes
all messaging.py classes are now gone and replaced by
packets.py classes
This patch completely refactors and simplifies how the clients
are created and used. There is no need now to have a separate
KISSRXThread. Since all the custom work for the KISS client is
encapsulated in the kiss client itself, the same RX thread and
callback mechanism works for both the APRSIS client and KISS Client
objects. There is also no need to determine which transport
(aprsis vs kiss) is being used at runtime by any of the messages
objects. The same API works for both APRSIS and KISS Client objects