so that the client IP is no longer the frontend IP, so rack
attack won't be blacklisting fontend IPs

- removes wkhtmltopdf entry ;
  as cloudooo has a hack to use wkhtmltopdf
  (see 8b49da34 in cloudooo repository)

- removes useless mimetype entries ;
  OnlyOffice entries were also defined in the generic_cloudoo recipe.

Jupyter: Add extra_data_list option to support display data similar to the original jupyter python backend.

Needed by ERP5 software release.

/reviewed-by: TrustMe

In case of failure, it gives a change to inspect test data of the first line.

The watcher should also watch for signals like SIGTERM killing sidekiq, which
are trapped by sidekiq, with sidekiq exiting successfully (with exit code 0).

To achieve this we rework our watcher-sigkill to be a generic watcher -
that can be given a set of restart exit codes including signal names and
monitors whether child process terminated with matching for restart exit
code.

Example usage:

	watcher 0,SIGKILL prog ...

Based on patch by @iv.
Discussion: https://lab.nexedi.com/lab.nexedi.com/lab.nexedi.com/issues/25#note_22085

An issue on Gitlab SR when pushing on protected branches occurs with git 2.11.
Gitlab issue: https://gitlab.com/gitlab-org/gitlab-ce/issues/25601

Fixes: https://lab.nexedi.com/lab.nexedi.com/lab.nexedi.com/issues/37

Getting them from the runner backup avoids to get false positive if some
of the instance's backup files were excluded using an exporter.exclude file

In prevision for gitlab-backup restore to be done in a script. In fact, it requires `sed` command to be available.
We have to add /bin to the PATH as `which sed` returns `/bin/sed`.

  - git-clone and build git-backup sources
  - add a cron job doing `gitlab-backup-pull` every 4 hours by default
  - add instance parameter to change backup frequency
  - add xnice for using less resources while backuping
  - add lock to avoid concurrent calls of backup script
  - add a specific software type `gitlab-export` doing all this instead of in
    `default`; this can be changed in Services > parameters (kirr's changes)

`coreutils`, `grep` and `tar` components are used by `gitlab-backup-pull`
script, as it is called from a cron and the PATH has to include these
binaries paths

This is needed until the patch regarding `pidfile` in wrapper.py
(571d6514) is added to released SlapOS cookbook egg.

The purpose of the added script is to shorten calling neoctl by removing the
need to constantly supply things SlapOS can provide on its own like
certificates and admin address. A sample command is now as simple as:

    ~/srv/runner/instance/slappartX/bin/neoctl set cluster STARTING_BACKUP

/reviewed-on !120

This reverts commit 7f6729de.

ZODB has been switched to ZODB4 in 447b27e6 (Switch from ZODB3 (3.10.7)
to ZODB (4.4.4)) including raising transaction version requirement to
1.7.0 so we can try to introduce zodbtools one more time.

/proposed-for-review-on !121

Without it, the interest of tweaking the partition table is limited, because:
- it is impossible to free space efficiently
- 'optimize table' is even slower

slaprunner: export script shouldn't succeed if the backup of the contained instances are running at the same time

- version up: setuptools 30.1.0
- revert commit 1d0a8073