Little fix and cleanup in the channels list code

Add an execute_incomplete_hello_adhoc_command e2e test

Include the policy files into the rpm

Add a irc.ppirc.net policy file

fix #3261

Remove redundant irc.freenode.net policy file

Add -Wconversion compile flag

Fix a segmentation fault when connecting to a server without a port

fix #3260

Release version 4.2

Wrong ifndef, kek

Add a missing ifnedf BOTAN_FOUND

Make botan’s policy configurable from a file

fix #3244

Remove a too old joke

Use our own proxy link to display the badges

For privacy reasons

[skip-ci]

Make sure we don’t exceed 512 bytes when grouping JOINs

Group simultaneous JOINs into a single command, to avoid flooding

We still split the JOINs with a key and the ones without

Use alpine for the docker image, and simplify the config + run stuff

Using env variable directly used by the process, it’s easier than calling
sed on the configuration file before we start the process.  Also we don’t
need to start as root anymore, and it’s a lot cleaner.

Configuration options can be overridden by setting env values

Better way to init the msghdr fields

Add a e2e test on alpine

Explicitely init the msghdr fields, to be compatible with any implementation