Buflines need to know which part of text to wrap with the timestamp. The
second parameter to `AddLine` (and shorthands) is that text, which after
wrapping is added as the `text` parameter to `NamedFormat`.
Timestamps are formatted at the moment buffers are flushed to the
client. The client parameter to `GetLine` provides access to the User
and the new server-time capability.
If a client sends STARTTLS to the IRC server, once the IRC server responds
with a 670 then it will expect all future communications to happen over
TLS.
The result of CIRCNetwork::IsUserOnline() will only show clients which
do not have the away state set. This value is not set from the IRC
command AWAY, but a future module could use this behaviour.
Some CIRCNetwork::IsUserAttached() checks are now moved into of
CIRCNetwork::IsUserOnline() checks.
This allows "away" clients to store buffer even if KeepBuffer is false.
