Add a <x muc#user> node on outgoing private MUC messages

See https://xmpp.org/extensions/xep-0045.html#privatemessage

fix #3321

Remove a warning (unused argument)

Use a specific (0.4.2) pyasn1 version in the debian Dockerfile

Little update on the INSTALL.rst database doc

Remove the ci deploy stop

Merge branch 'postgresql' into 'master'

Add postgresql support

Closes #3237

See merge request louiz/biboumi!18

Update the docker images to enable postgresql, and document them

Document the db_name option (with postgresql support)

db_name also accepts postgres:// scheme for PostgreSQL connections

Merge branch 'policy-irc.gnome.org' into 'master'

Add specific policy files for irc.gimp.org and irc.gnome.org

See merge request louiz/biboumi!20

Add specific policy files for irc.gimp.org and irc.gnome.org

Only run the unit tests with postgresql if TEST_POSTGRES_URI env var is set

Even if we built with postgresql’s support

Always free the PGresult pointer returned by PQexec

Fix a somewhat big memory leak

Run some of the ci tests against a postgresql docker container

Fix a few warnings

Handle postgresql and sqlite3 libs properly

Do not fail to compile when one of them is missing but the other one is not.

Raise an error when trying to open a database with the missing library.

see #3237

Merge branch 'postgresql' into 'postgresql'

Some fixes for the postgresql branch

See merge request louiz/biboumi!19

Actually free the database on Database::close()

.release() returns the pointer and releases ownership *without*
destruction.

Make destructor of DatabaseEngine virtual

Make destructor of Statement virtual

I got an ASAN error otherwise (type mismatch)