Support multiple nick session, except for IQs

ref #2556

Forward everything to all concerned XMPP resources

Remove all usage of std::list

Add methods to know which resource is on which server or channel

Associate a bridge with a bare JID instead of a full JID

ref #2556

Changelog into rst

Check the length of the JID parts when copying into the jidprep buffer

We trust the XMPP server, but maybe not enough to not check that

Changelog into rst

ci: include only the rpm and srpm directory in the artifacts

The rest is useless and takes a lot of space

Update the build process to take into account the rst files

Merge branch 'rst'

First rst attempt

Test the execution of the hello command

e2e: possibility to extract a value from a stanza and reuse it in send_stanza

Use “using” instead of typedef

ci: Have two builds: on fedora and on debian

Add a Dockerfile for biboumi-test-debian

Do not use std::endl for each line when saving the conf file

Fix build with POLLER=POLL

Run e2e in a subdirectory and lighten the build artifacts