Motivation for this change

rsyslogd is currently not building because of this, causing the -small jobset to fail its eval on both unstable and 20.03 since #80746.
I'm not sure if rsyslog will be working after this bump, as I don't have an rsyslog setup (is anyone even using this since journald remoting exist?).
The rsyslogd binary launches correctly, but it it didn't do any SSL stuff so I was unable to test that.

Also, I have no idea how big the impact of this PR is…

cc @NixOS/nixos-release-managers if it works, it needs a backport to 20.03 to fix the eval.

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 nixpkgs-review --run "nixpkgs-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.