without this change, configure would use openssl lib for MD5, sha256sum, ...
if openssl development files are present on the system.

Previously, zstd support was only compiled if zstlib was installed in
the system.

the previous version was failing like this if lib64 doesn't exist:

libcap: Command 'set -e;cd /opt/slapgrid/shared/libcap/4d09237abd7cb34117fccc1d3c3bc862
[ -d lib64 ] && ln -s lib64 lib' returned non-zero exit status 1

option --enable-readline doesn't exist anymore (has it ever?)

INFO     pcre_jit_compile.c:65:2: error: #error Unsupported architecture
INFO        65 | #error Unsupported architecture
INFO           |  ^~~~~

See https://github.com/luvit/pcre/blob/5c78f7d5d7f41bdd4be4867ef3a1030af3e973e3/pcre_jit_compile.c#L65

only for python3

See https://gcc.gnu.org/bugzilla/show_bug.cgi?id=99090

We need to patch ffmpeg to be able to compile with this version of
binutils.

f

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 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 nexedi/slapos!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.