[Conkeror] [PATCH 1/2] webjump: reworked code for the "alternative" url

[David Kettler]

> This looks good.  I don't see any reason to keep compatibility with the
> two-element-array form, though.  Conkeror's API is still unstable and I
> think everybody understands they will have to update their rc's with
> changes as we figure things out.

Okay, I'll remove that.  When I push I'll also update the examples on 
the Webjumps wiki page and note the change on the BreakingChanges page.