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.
UpdateModule has been moved to CZNC because it doesn't really fit into
CUser. The new UpdateModule will reload the module for global modules,
user modules and network modules.
Fixes#69
