Also, as backward compatibility is not needed at this level, implement what
is requested in BBB comment.

This reverts commit a26dcf05.

Revert "use erp5-component branch of erp5 repository for erp5-component branch of slapos repository."

This reverts commit 1766ba21.

CA-related section do not make obviously sense to be merged, so keep
them separated.

No generic and readable serialisation mechanism protect us against the
appearance of the following strings:
- "${"
- " ;"
As those have a special meaning for buildout, they need to be escaped.
So we must use a buildout-specific serialisation format taking care of
those.

Also, hide ip_list for the same reason: it's a partition property, not a
partition parameter. It is not handled yet (not needed).
Also, rework documentation a bit.

Prepares "slapparameters" recipe renaming.

No local commit is supposed to exist.

It's necessary on some platforms so it doesn't find the system zlib, even though it doesn't depend on zlib directly.

It's not necessary and was finding system X11 libraries it shouldn't touch.

update md5sum of clarified patch

Seems like old compilers need some help with indirect dependencies of libraries.