Address RMH's issue:

When the local system has multiple AKAs for the same zone and we are picking a
origin/source address suitable for the destination address, pick the AKA that
matches both the zone and net of the destination address first (if there is
such a local AKA). It's the same logic used in sbbs_t::netmail() to display
the originating address, so the AKA picking logic now matches what is shown
to the netmail author and what SBBSecho will actually use.