When locked, these hooks set my jabber presence to "away" and pause
MPD if it's playing. When unlocked they set my jabber presence to
"online" and resume MPD if it was playing before.
- Change the font used.
- Use the `:thin' border style to hide windows behind certain other
windows. For example: When using Emacs and conkeror, if conkeror is
placed behind emacs and the border is `:tight' I will see a tiny
portion of the conkeror window on my screen (due to emacs' size
hints). On the other hand if I use `:thick', it will use the border
color to fill it up, with `:thin' it uses the unfocus-color.
