previous version is no longer installable causing all tests to fail
in a loop installing setuptools_scm for jsonschema, a problem which
was fixed in f1e7230e (cookbook: ensure working version of setuptools_scm, 2020-05-26)

en_US.UTF-8 might not be installed and in such case postgres refuses to start.

--disable-static is temporarilly removed due to build error
with xml2-config that does not support '--dynamic' argument.

slapos.cookbook recipe tests sometimes manipulate buildout eggs working set,
which will install packages from pypi. makeRecipe utilty function was
guessing buildout egg folders by parsing builout.cfg, but since a33844a2
(slapos-testing, slapos-sr-testing: Don't duplicate instance.cfg prologue
that is already provided by stack/nxdtest/instance.cfg, 2021-03-22),
these are defined in an extended profile, so this stopped working.

Instead of this fragile pattern, make the test software release pass the eggs
directories with an explicit environment variable.

See merge request nexedi/slapos!951

The golang.go extension can overwrite the shell environment PATH,
which can break the shell.

1.0.154 can not be installed anymore because buildout tries to install
setup_requires packages to their latest version

When system GCC is too old, SlapOS GCC may produce binaries
that 'strip' does not process correctly.

The _vh_ prefix is needed for every single outer path element for
VirtualHostMonster to be able to properly reconstruct the outer path.

Also remove old golang 1.13 version

This Go release is EOL now.

Don't drop support for Go1.12 and Go1.13 yet. Even though those Go releases are
also EOL since long ago, they are still being used inside SlapOS:

Go1.12 - by gitlab  (/cc @jerome, @alain.takoudjou)
Go1.13 - by galène  (/cc @tomo, @alain.takoudjou)

Component should not change a global setting like Go/Python/GCC version.
Only leaf software-releases can.

Going Go1.15.8 -> Go1.15.10 brings in fixes to compiler, runtime and stdlib
including security fixes to archive/zip and encoding/xml:

https://golang.org/doc/devel/release.html#go1.15.minor

Tested on helloworld SR (by adjusting it to use go1.15 instead of go1.16).

Going Go1.16 -> Go1.16.2 brings in fixes to compiler, runtime and stdlib
including security fixes to archive/zip and encoding/xml:

https://golang.org/doc/devel/release.html#go1.16.minor

Tested on helloworld SR.

See merge request !938

Before this commit, running
  'slapos node software'
and
  'supervisorctl start slapos-node-software'
behaved differently because the PATH and other environment variables
where different in the interactive theia shell and in supervisord.

Add a test to check that the PATH is the same for the interactive shell
and the supervisord services. This is important because slapos commands
like 'slapos node software' may behave differently in the shell and the
as supervisord services otherwise - each undoing what the other builds.

SlapOS Master is going to use Wendelin.core 2.
Wendelin.core 2 works with either ZODB4-wc2, or ZODB5, but not with ZODB4(*).
ERP5 does not currently work with ZODB5.
-> this leaves ZODB4-wc2 as the only choice.

(*) see nexedi/ZODB@8e7eab33
for details.

/reviewed-by @tomo, @rafael
/reviewed-on nexedi/slapos!944

See merge request nexedi/slapos!937

If key or csr are already present, we should not re-run this
openssl command which generates a new key and a new CSR.

hashlib.md5 needs bytes, read the file as binary to prevent

    TypeError: Unicode-objects must be encoded before hashing