fix: add missing variable

See merge request !8

add automatic account deletion #25

See merge request !10

ci was broken

The bug was repported to the Cryptpad team and it seems that it won't be
fixed soon/at all: https://github.com/xwiki-labs/cryptpad/issues/355

To avoid flooding syslog main log file.

check_mem reports usage for the host.

This reverts commit 4932a392: "Fix
startup of acmetool systemd timer".

I don't remember why I made this commit, but since acmetool.service is a
oneshot unit, it doesn't make sense to start it each time the playbook
is run. We just have to make sure that the associated timer effectively
start the unit periodically.

Remove the task that start acmetool and make it a handler of the apt
task, so acmetool is started only after installation.
Moreover it seems that the acmetool package now create its hierarchy in
/var/lib/acmetool/ so we don't need to start it *before* the next tasks
and acmetool can be safely started at the end of the play.