Because dufs only reads certificate on startup it does not detect when
the certificate was renewed.

The only thing supported by dufs is to restart, but we can not restart
the service, because the partition can not communicate with the
supervisor.
To solve this, use another level of process supervisor: using zdaemon
we can run a process in the foreground, so that it stays under
slapos' supervisor control, but still expose a way to restart the
process using zdaemon API.

This reverts commit b2db18a0cb672204ff1dd9bc759934b332d433f5.

This contain the fix for go 1.16 that we backported, so we can use
upstream repository again

For now this still have to be enabled with a config like this in a .conf
file in srv/telegraf/extra-config/  :

    [[inputs.execd]]
      name_override = "slapos"
      # this needs sudo when using can not access supervisor socket, like when being installed in root slapos
      command = ["/usr/bin/sudo", "$SOFTWARE_DIR/go.work/bin/telegraf-input-slapos", "-config", "/path/to/slapos.conf"]

/path/to/slapos.conf would contain something like this:

    [[inputs.slapos]]
      ## Folder where partitions are located
      instance_root = "/srv/slapgrid/"

      ## filepath.Glob pattern to look for recursive instances
      recursive_instance_glob_pattern = "*/srv/runner/inst*/"

      ## Path of supervisor socket, relative to instance root
      socket_name = "sv.sock"

This version has a new sql input, that can be used to get metrics from sql
queries.

This is a fixup of 431eed50

The version of pandas was overwritten in
02fad6a8 but didn't work with python2.

Then the version was downgraded to 0.24.2 in
15569ea9 but ERP5 doesn't work with this
pandas version:
Traceback (most recent call last):
  File "/srv/slapgrid/slappart3/t/dgg/soft/63c49071f5be63057dd48d7a85c10226/bin/runTestSuite", line 325, in <module>
    import Products.ERP5Type.tests.runTestSuite
  File "/srv/slapgrid/slappart3/t/dgg/soft/63c49071f5be63057dd48d7a85c10226/parts/erp5/product/ERP5Type/__init__.py", line 92, in <module>
    from . import ZopePatch
  File "/srv/slapgrid/slappart3/t/dgg/soft/63c49071f5be63057dd48d7a85c10226/parts/erp5/product/ERP5Type/ZopePatch.py", line 30, in <module>
    from Products.ERP5Type.patches import Restricted
  File "/srv/slapgrid/slappart3/t/dgg/soft/63c49071f5be63057dd48d7a85c10226/parts/erp5/product/ERP5Type/patches/Restricted.py", line 491, in <module>
    allow_type(pd.indexes.range.RangeIndex)
AttributeError: 'module' object has no attribute 'indexes'

So reuse old version 0.19.2

version 0.25.3 is not python2 compatible.

Use version 0.24.2 as it is compatible with both python2 and python3.7
(even though we have no reason to use python3.7 nowadays).
See https://pypi.org/project/pandas/0.24.2/

This is a followup of 0d717989

This is a followup of 02fad6a8

This is a frontend used to provide information about various aspect of the
master instance status, like rejected slaves, failed failsafe slave
publication and maybe more.

Due to various reasons there might be an error while publishing information
about a slave, and such error would end up with stopping the processing of
the partition. This is undesired effect, thus switch to publish_failsafe style
in order to continue processing.

Publish only for active slaves.

Empty extra_slave_instance_list is a leftover of never fully working approach
of slaveless caddy-frontend implementation, so just drop it.

See merge request !1280