[Gpsbabel-code] New palmdoc option

[Ron P. <ro...@gw...>]

Necessity, they say, is the mother of invention.

I uploaded a recent PQ to my GPS on Saturday.  Since I used the
default options, the waypoints got the GCIDs for names.  I uploaded
the same PQ to my Palm at the same time, in PalmDoc format.  The
bookmarks got named based on the cache names.  D'oh!

So, I added a new option to PalmDoc: bookmarks_short.  I think it
could use a better name, but I couldn't think of one.  What it does
is add the GCID (or other shortname) to the start of the bookmark,
so that it looks like 'GC150C:FiveMedls'  When combined with
sort,shortname (is that fundamentally different from sort,gcid?) it
makes it much easier to look up the details of the cache that just
popped up on your nearest waypoints search.

Anyway, I committed that change on Saturday and then forgot about
it.