include a fixed test vector in password tests

* bump docker base image to alpine 3.19

Fixes #2103

add `init: true` to docker-compose.yml

Follows up from #2096, #2097

* add --init to suggested docker run invocations

See #2096; this should fix unreaped zombies when using an auth-script or
ip-check-script that spawns its own subprocesses, then exits before reaping
them.

* add a note on why --init

bump irctest

Fix typo in ACCOUNT_NAME_MUST_BE_NICK code

* changelog for v2.12.0-rc1

* bump date

upgrade go-ident

Fixes a socket leak (that doesn't seem to be affecting tilde.town?)

* Fix #1997 (allow the use of an external file for the email blacklist)
* Change config key names for blacklist (compatibility break)
* Accept globs rather than regexes for blacklist by default
* Blacklist comparison is now case-insensitive

explicit docker.io in Dockerfile

See #2082

implement draft/no-implicit-names

bump go to v1.21

add channel autojoin feature

See discussion on #2077

Import AppArmor profile

Signed-off-by: Georg Pfuetzenreuter <mail@georg-pfuetzenreuter.net>

upgrade to irc-go v0.4.0

fix #2013

See #2013; given that plaintext is deprecated now, it seems like there is no
added value from continuing to police this.

Dockerfile: `apk upgrade` before `add`