Fixes#105.
Prior to this commit the channel chosen to send on in a
call to MessageChannelCollection.prepare_privmsg was not
respect and instead the entry in the active_channels was
used, resulting in a Taker not seeing the presence of Makers
in other channels than the one chosen here. This meant that
in cases of channel disconnection, fallback to other channels
was failing (although not always deterministically). This
commit fixes this by allowing the sending of the privmsg
on a specific channel, as was intended, and so when Makers
send messages on multiple channels, they are marked as seen
on all those channels, allowing dynamic switching in case
of channel connection failures.
In addition there are two minor improvements to debug
messages.
AdamISZ
3a2c462c6b