Version up zc.buildout, pip and zc.recipe.egg.

Version up slapos.rebootstrap to adapt to buildout3.

This will be used to add the sqlite3 binary directory to PATH.

See neoppod@5923f8f5

This now supports producing html reports directly

nbd2-host and nbd2-port are asserted too.

Test are reorganized to easily assert mixed scenarios.

Zope no longer serve XML-RPC in ERP5, unless it is explicitly enabled
using this.

See nexedi/erp5!1931

--enable-readline is broken:
  - it searches for readline.h instead of readline/readline.h
  - it does not abort when it fails to find headers
Use --with-readline-inc so that it sets HAVE_READLINE.

Also use the dedicated configure option to enable update limit.
And sqlite3 does not depend directly on ncurses.

See nexedi/neoppod@71564067

See merge request nexedi/slapos!1566

See merge request !1576

See merge request nexedi/slapos!1572

to avoid the following error:
relocation R_X86_64_32S against `.rodata' can not be used when making a shared object; recompile with -fPIC

software/osie-coupler: keep the build source directory instead of having another open62541-source part.

This is a fixup of 210e2d76.

Without full diff it's often impossible to understand the problem of JSON
schema introduced by the developer.

Upgrading pygolang in the context of SlapOS brings in some minor speedup
and fixes, but is mostly needed for ors-amarisoft software release due
to fix for a memory leak and optimized timers:

nexedi/pygolang@2ec5e96b
nexedi/pygolang@044deb35

The full list of the changes is below:

nexedi/pygolang@pygolang-0.1...pygolang-0.1-69-g044deb35

/cc ORS team (@jhuge, @lu.xu, @tomo, @xavier_thompson, @Daetalus)
/reviewed-by @jerome
/reviewed-on nexedi/slapos!1569

Similarly to wendelin.core (see ad34ff4a "wendelin.core: Always use git
checkout for both release and development version") let's switch pygolang to
install via git checkout for both release and tests.

This way we avoid dependency on pypi and will be able to do minor updates
without doing bigger to-pypi releases. Always using git checkout also helps
security a bit because we remove reliance on trust to tarball received from pypi.

/cc @kazuhiko
/reviewed-by @jerome
/reviewed-on nexedi/slapos!1569

@jerome reports ue/cell/* schemas are not valid JSON and he is right: in
30179be5 I made a mistake to add extra trailing " after propertyOrder
integer value. Fix that.