[tex-hyphen] Finnish basic hyphenation rules

[Arthur Reutenauer]

> You have done very good work in making this easy to test and develop.
> Thank you very much.

  You’re very welcome.

> There is “TODO: ‘c’” in makelist file so I did that and pushed to new
> branch "experimental-c". Letter “c” is basically “k” or “s” consonant. I
> will merge these changes to master branch if this fits to your "TODO"
> plans.

  Looks good, feel free to merge.  I suggest you replace ‘.c2h’ by ‘c2h’
as it can occur in the middle of words too, in e. g. cha-cha-cha or
scherzo.

	Arthur