Use the latest firefox and geckodriver to support file uploading tests.

Since Caddy 0.11.1, certificates has to match sites
(Thanks Luke)

Installing from master is problematic because when master does not build
we don't have test results and we don't see that it's broken.

/reviewed-on !474

We don't need ssl features in shellinabox as we make it listen on a unix socket.
This allows to remove the dependency between shellinabox and openssl.

also use a real bash and not busybox

/reviewed-on nexedi/slapos!291

  If someone is developing an erp5 test node inside a webrunner, there is no reason to put entire data on resilience.

repositories if configured are public. Thus such a check will by design fail.

@seb, @rafael  please review. I tested this and it works.

/reviewed-on nexedi/slapos!114

This solves the issue of accessing any file hosted by the apache in every test node when there is no IPv6 access for the client.

Conflicts:
	software/erp5testnode/software.cfg

This updates links to slapos.git in the tree to point to new location.

We do so whole-tree except one place in stack/monitor/ :

    [download-monitor-static]
    recipe = hexagonit.recipe.download
    url = http://git.erp5.org/gitweb/slapos.git/snapshot/930be99041ea26b7b1186830e5eb56ef0acc1bdf.tar.gz
    ...

(see d8800c0b "monitor: Download statics files from snapshot")

The reason we do not update that link yet, is that 930be99041ea26b7b1186830e5eb56ef0acc1bdf
is a tree object and gitlab does not allow to dowload tree object as archives (yet ?)

So for now that link stays unconverted - and we'll think how to do with it.

No need to expose this slapproxy to the outside.

Add new variables used in testnode software.
Add new rules to httpd, in order to make depositories accessible
by obfuscation.

Use shellinabox on testnode with self provided
shell command thanks to busybox.