This commit adds to the instance list https://pol.social,
currently just under 1000 users; open joining policy; healthy
community; not Cloud-flared; admin contacts easy to find -
admin'd by a non-profit foundation that aims to provide FOSS
advice and servers - https://ftdl.pl/ (Foundation Technology for
People).
This commit also orders the language section in which pol.social
is proposed for addition, based on alphabetical order of the
names of the languages; and changes "Slovakia" to "Slovakian".
b6e0d92074