Switch to pure meson build system and adapt configuration for SlapOS
requirements.

Support multiarch env by simply linking from lib64.

Version 249.6 incorporates fix from https://bugs.gentoo.org/824026 for:
  meson.build: ERROR: Object <[BooleanHolder] holds [bool]: False> of
  type bool does not support the +

This was removed from ERP5 in d9be34803b (erp5-util: remove zodbanalyze,
that is now a part of https://lab.nexedi.com/nexedi/zodbtools ., 2016-12-15)
but we were still installing a broken script here.

using ./format-json script

From now on, hosts keys will always be checked and there is no way
to disable the check

remove also software/unstable/zimbra-kvm which were still referencing
those recipes

using https://github.com/matomo-org/matomo/pull/13676

This repairs a NameError introduced in 397726e1 (erp5/neoppod/slapos:
Support for python3 from aurel/zope4 branch., 2022-02-03) that was
causing ERP5-IOS test suite to fail in loop.

a binary make use of it and do not any more download a binary. Instead
compile on the fly.

Nettle has hard dependency on openssl, and --disable-openssl is only
disabling optional feature of it.

This reverts commit 054386d6.

It proven to be insufficient to fix issues with PYTHON make variable
surcharging from top make.

also update apr and apt-util.