v3.9.1-ls101

LinuxServer Changes:

Rebase to Alpine 3.15

ddclient Changes:

Yet again it's been a while but here is new release of ddclient. As usual,
there are some important changes and some documentation is modified.
A detailed overview can be found in git log but here's a quick overview:

• added support for Yandex.Mail for Domain DNS service
• added support for NearlyFreeSpeech.net
• added support for DNS Made Easy
• added systemd instructions
• added support for dondominio.com
• updated perl instruction
• updated fritzbox instructions
• fixed multidomain support for namecheap
• fixed support for Yandex

A very big thank you for everyone who created a pull request on github and
for everyone who helped to fix the little issues caused by the new providers.
And a very special thank you for @DaveSophoServices who started to help with
the maintenance of ddclient.