erp5@d8b5b910 added the functionality to ERP5 to
set its soft limit of allowed open file descriptors to the system wide hard limit.
This parameter is useful for Wendelin based instances where the 1024
limit is easily reached.

With this patch, this parameter can also be set via SlapOS, which
simplifies usage of the Wendelin SR.

The new ghostscript could not decrypt some password protected files. It turned out to be a bug in ghostscript but in the process of investigating I thought it might be related to missing libidn that is also used in PDF passwords, so I added it.

See merge request nexedi/slapos!1455

Fixes decryption of some password protected PDFs

INFO configure: WARNING: unrecognized options: --disable-threadsafe

without libidn, decrypting password protected PDFs does not fully work.

This is a fixup of f6281e7a.

This fixes 3c514224

Since nginx 1.25.1 ssl directive has been dropped, so fix the configuration
template to work with 1.25.2.

Update nginx-push-stream to follow nginx API changes.

Will support zlib 1.3+

Extend PATH to make xzcat available.

Extend PATH to make xzcat available.

Enforce python3 usage, as the newer version requires python3.

Empty values are considered not provided, so provide a template which
produces a file with a lone comment.

Instead of using openssl-1.0 and overriding the new versions to use
openssl, use openssl by default and override in the old versions to use
openssl-1.0