geography.cfg: correct wmllint spelling for Castelfranc and Rumyr

These towns were misspelled in their encyclopedia entries, compared to
the Wesnoth map. All of the instances in my UMC collection follow the map
spellings, so I am not leaving the incorrect spelling as an alternative.

Also, there were spelling rules for both "Memog" and Melmog on separate
lines. No reason to keep the mistake around.
wmllint: remove -f --future option

Going back through wmllint's history, it turns out that there apparently
haven't been any "experimental conversions" since 1.4. Especially since
some new switches have been added recently, the clutter makes it no longer
worth keeping around.

A comment notes the option's disappearance, in case anyone is interested
in recreating experimental conversions again.
wmllint: remove -p --progress option

This option is pretty similar in effect to -v -v. Particularly now that
some new switches have been added recently, the clutter makes it no
longer worth keeping around.

A comment notes the option's disappearance, in case anyone wonders what
happened to it or how to get the same functionality.