bug#17755: 24.3; ERC user mode support

[Kelvin White <kelvin.white77@gmail.com>]

At Wed, 18 Jun 2014 14:32:09 -0400,
Stefan Monnier wrote:
> 
> >> > + (defsubst erc-channel-user-owner-p (nick)
> >> > +   "Return t if NICK is an owner of the current channel."
> >> Usually we say "non-nil" rather than "t", unless the callers need to
> >> rely on the return value being t rather than some other non-nil value.
> > Indeed, the callers do rely on the value being t in this case. rather than
> > just non-nil
> 
> Hmm?  I see only one call to erc-channel-user-owner-p and the result is
> passed to `cond' so any non-nil value will work as well (which is the
> way it should be for functions named `<foo>-p').
> 
You are right, this could be non-nil. I was looking at
`erc-channel-user-owner' not the predicate form
`erc-channel-user-owner-p'.
> > + 2014-06-11  Kelvin White  <kelvin.white77@gmail.com>
> > + 
> > + 	* erc-backend.el: Handle user modes in relevent server responses
> > + 	* erc.el: Better user mode support.
> > + 	(erc-channel-user): Add members for new modes.
> > + 	(erc-channel-member-halfop-p, erc-channel-user-admin-p, erc-channel-user-owner-p): Use new struct members.
> > + 	(erc-format-nick, erc-format-@nick): Display user modes as nick prefix.
> > + 	(erc-nick-prefix-face, erc-my-nick-prefix-face): Add new faces to separate colors if desired.
> > + 	(erc-get-user-mode-prefix): Return symbol for mode prefix.
> > + 	(erc-update-channel-member, erc-update-current-channel-member, erc-channel-receive-names): Update channel users.
> > + 	(erc-nick-at-point): Return correct user info.
> > + 
> 
Ah yes, I did change the rest of the code to under 80 columns, but it
looks like I missed the changelog. Sorry, it's been one of those days.
> Please try a bit harder to stay within 80 columns.  M-q is your friend.
> 
> > ! ;; Hacker: l3thal@smashthestack.org
> > ! ;; Created: 2004-05-07
> > ! ;; Hacked: 2014-06-08
> 
This and the next comment slipped my me on mistake. 
This was for my own use to track revisions as It wasn't in version control.
It should not have been included in the patch 
> If you want to add your name, add it to the "Author:" part (one per
> line, see in erc.el for an example).  And don't add entries like
> timestamps of when it was last changed.  This just causes spurious
> conflicts when merging branches.  This info is readily available via
> "bzr log".  I tolerate things like "Created" (tho find it a waste of
> perfectly good bits and screen real estate) because, by nature these
> should never change and hence don't cause such spurious conflicts.
> 
> > ! ;;; hacked
> >   (define-erc-response-handler (JOIN)
> > !   "HACKED: Handle join messages."
> 
> What does this "hacked" mean here?  Looks like left-over annotations you
> used temporarily to keep track of what you changed.
This was a mistake, please see above.
> 
> Anyway, the patch looks OK to me.  As soon as your copyright paperwork
> comes through I can give you write access and you can install it.
> 
> 
>         Stefan