Add OpenMandriva

Add missing 'is'

Fixes: 31692ee6 ("Initial commit")

Change Fastmail config to use implicit TLS instead of STARTTLS.

Fastmail supports implicit TLS so there is no reason to use STARTTLS.

Add Rocky Linux

Add missing styles for Fastmail accordion

Note systems with sendmail setup needn't be configured

Make Nix install instructions fully comprehensive

Added Fastmail config info

Fix meaning of "Sign off"

Use direct TLS by default, add hints for STARTTLS

In general it's better to use direct TLS connections. Default to
direct TLS in our example Git config.

Add a hint about STARTTLS, because (1) some old providers may still
not have direct TLS and (2) the Git smtpencryption option is very
confusing.

Bump Alpine version

Ditch pystache

Reduce Arch dependencies

https://bugs.archlinux.org/task/71016 and https://github.com/archlinux/svntogit-packages/commit/ba9e7cefa33d7d7e4027e467138e097e48d50ba9 reduce the needed dependencies down to two.

.builds/python.yml: upgrade to Alpine 3.13

Use pages.sr.ht for deploy

Add warning for protonmail users

Fix mailing list name in stage-2-success

The surrounding text was telling to write to sr.ht-discuss but the given
list is public-inbox.

Add clear instructions on how to contribute to git-send-email.io

Update Gmail-specific instruction

It is not possible to use regular SMTP with login and password for
Google accounts without enabled two-factor authentication[1]. App
passwords page just says "The setting you are looking for is not
available for your account" is such case.

[1] https://support.google.com/accounts/answer/185833

Update support email address to sr.ht-discuss