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.

We need to remove the BOM because old compilers choke on it (ex.: gcc 4.3.4)

tesseract-eng-traineddata now does all the work

Remove deleted part from erp5 stack as well

Fix broken autoconf invocation

Use a trained data tarbal containing the correct datarootdir structure and the English data.

Instead of using the provided script. Otherwise it'll desperately try to use libtool and its autoconf macros from the system.

Requiring leptonica webp and giflib

This enables ctypes to find the slapos libmagic, instead of the system one

We are never supposed to merge anything. We are supposed to just follow
upstream. pull merges, so it's just the wrong tool.
Instead, fetch and reset.
It is not a problem to always reset, as user already cannot rely on
repository's survival across updates: if there is any error reported by
git command, the repository will be wiped out. So resetting will not do
any more harm than what can already happen.
Also, properly quote paths to protect against spaces (in both command and
update-command).

This prevent to upload the same URL multiple time in shacache with different
md5sum.