This is a fixup of cce1a1c9.

See merge request nexedi/slapos!1650

See merge request nexedi/slapos!1650

Fixup of a3e15fc4.

Before this patch SlapOS users had to manually add SSL files in case WCFS
was used in combination with NEO+SSL. This is bad as we can easily forget
to update local parameter files when updating instance parameters ("_ca",
"_cert" and "_key"). This builds up on 706801f2.

/reviewed-by @kirr @jerome
/reviewed-on !1620

NEO/go doesn't understand what it should do with these parameters and
raises an error in case they are added to the NEO URI [1].

[1] https://lab.nexedi.com/kirr/neo/-/blob/f1a1bb9d/go/neo/client.go#L551-553

/reviewed-by @kirr @jerome
/reviewed-on nexedi/slapos!1620

'wendelin.core' needs to differentiate between a NEO cluster with SSL
and without SSL from a normalized zurl (e.g. a zurl which doesn't
contain any paths to encryption files). Therefore the 'neo' / 'neos'
scheme difference was introduced in neoppod@bc3e38ea.
This patch introduces this difference in zurl that SlapOS provides for
'wendelin.core' - this essentially fixes a ERP5+WCFS setup that connects
to a NEO cluster with activated SSL.

/reviewed-by @kirr @jerome
/reviewed-on !1620

We only need one query identifier ('?'), while query options should be
separated by the separator identifier ('&'). This essentially changes
the resulting NEO URI from

  neo://cluster@IP&a=b?b=c

to

  neo://cluster@IP?a=b&b=c

/reviewed-by @kirr @jerome
/reviewed-on !1620

This reverts commit 0cf70a6e.

NEOgo and NEOpy diverged wrt the NEO URI format. Due to NEOgo
changes in the NEO URI format nexedi/slapos@0cf70a6e was necessary.
However in nexedi/neoppod!18 and
nexedi/neoppod!21 a common
URI format for NEOgo and NEOpy was agreed on. Therefore most changes of
nexedi/slapos@0cf70a6e are no
longer necessary. We still need the difference between 'neo' (without
SSL) and 'neos' (with SSL), but we'll re-introduce this in the next
commit.

This revert keeps the changes made in nexedi/slapos@6fa1d9ae as this is still
needed.

/reviewed-by @kirr @jerome
/reviewed-on nexedi/slapos!1620

New 'wendelin.core' version contains several bugfixes that were
discovered in field usage. Furthermore it introduces the new 'ZBlk_fmt'
option 'auto' that heuristically sets ZBlkfmt to gain a good ratio between
read time and database size, improves python3 compatibility and synchronizes
NEO zurl scheme between NEO/py and NEO/go.

See wendelin.core@63153845...db6fea3d
for complete list of changes.

/reviewed-by @kirr @jerome
/reviewed-on !1620

don't test it in python2 anymore

it seems the RPC deleteToken never returned NOT_FOUND anyway.

we are not using this command line utility, in erp5 tests (
product/ERP5Type/tests/Python3StyleTest.py ) we are using the python
API directly, not the command line.

if developer needs to invoke 2to3 it is present in ${python:location}/bin/

Also, md5sum option has been renamed runtime_plc_md5sum.

This is a fixup of 7df1d5fe.

this does not work when serving the raw blob on gitlab, so it is not
always usable for parameter editor.

The ISO used is a modified version of the Online version (no
repositories bundled in the CD) with updates
(SLE-15-SP6-Online-x86_64-QU1-Media1.iso) available in
https://www.suse.com/download/sles .

The only modification done is to set the "timeout" variable in
/boot/x86_64/loader/isolinux.cfg to 0, so that the KVM does not
automatically boot from disk after a timeout if the user does not press
a key (which was a problem that we found while testing this distro that
made difficult to install it).

See merge request nexedi/slapos!1655

And revert "software/slapos-testing: Quickfix python -E errors" now
that pygolang's pymain supports -E option.

This reverts commit 0fad9a6d.

Use md5sum to check if what we download is what we actually got.