For SP2720, set shortname length to 20. (Which isn't supported yet.)

For SP2720, set shortname length to 20.   (Which isn't supported yet.)
For 60CSX, set shortname length to 14, allow spaces, lower case, and i18n.
For Quest, allow i18n.
For all receivers not explictly marked for i18n, force ASCII.
More aggressively discard clearly bogus altitude.
When writing routes, include route names.
Populate lat and long when writing routes.  (Guess that's not used much.)