[tex-hyphen] hyph-utf8 documentation

[Arthur Reutenauer]

> The hyph-utf8 documentation ("hyphenation.pdf") lists all supported
> languages.

  For hyphenation.

> But another synonym for ngerman is missing: nswissgerman (defined by Babel).
> Please add.

  If it’s a Babel synonym, it’s not really our responsibility, but sure,
we can probably mention it somewhere.

	Best,

		Arthur