unit: 1.12.0 -> 1.13.0

[Izorkin]

Motivation for this change

Update nginx unit to version 1.13.0

Changelog:

• Feature: basic support for HTTP reverse proxying.
• Feature: compatibility with Python 3.8.
• Bugfix: memory leak in Python application processes when the close handler was used.
• Bugfix: threads in Python applications might not work correctly.
• Bugfix: Ruby on Rails applications might not work on Ruby 2.6.
• Bugfix: backtraces for uncaught exceptions in Python 3 might be logged with significant delays.
• Bugfix: explicit setting a namespaces isolation option to false might have enabled it.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS linux)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Ensured that relevant documentation is up to date
• Fits CONTRIBUTING.md.

Notify maintainers

cc @

[Izorkin]

Added commit to fix this error:
nginx/unit#349
#73513

[alyssais]

I think this has never come up before because packages don't generally want multiple versions of Ruby at once. I'm not familiar with Unit. Can you explain briefly why it needs multiple versions?

[Izorkin]

https://www.speedshop.co/2018/03/28/nginx-unit-for-ruby.html - ruby application server.

For example, if need to run applications, one of which supports version 2.4, and the other application only 2.6

[ryantm]

Since this involves hundreds of rebuilds it should probably target the staging branch.

[Izorkin]

Rebased to staging.

[Izorkin]

@GrahamcOfBorg eval