nixos/ircd-hybrid: fix bug in which fails to substitute iproute2

[ret2pop]

… to substitute iproute2

iproute2 is named wrongly as iproute which causes the control.in file to have @iproute@ unsubstituted for the nix store path. This causes the service to fail instantly. This PR fixes this bug by naming it iproute2.

Example:

#! /nix/store/8vpg72ik2kgxfj05lc56hkqrdrfl8xi9-bash-5.2p37/bin/bash -e

# Make sure that the environment is deterministic.
export PATH=/nix/store/9m68vvhnsq5cpkskphgw84ikl9m6wjwp-coreutils-9.5/bin

if test "$1" = "start"; then
	if ! /nix/store/9bzy8ydbfsg3gkk11wcaxaj5kmgvp9s9-procps-4.0.4/bin/pgrep ircd; then
	if true; then 
		while ! @iproute@/sbin/ip addr | 
			/nix/store/qjsj5vnbfpbg6r7jhd7znfgmcy0arn8n-gnugrep-3.11/bin/grep inet6 | 
			/nix/store/qjsj5vnbfpbg6r7jhd7znfgmcy0arn8n-gnugrep-3.11/bin/grep global; do
			sleep 1;
		done;
	fi;
	rm -rf /home/ircd
	mkdir -p /home/ircd
	chown ircd: /home/ircd
	cd /home/ircd
    env - HOME=/homeless-shelter $extraEnv \
        /nix/store/hny4q04ns200gn6kvcmwj4w1pf9vv5zf-shadow-4.16.0-su/bin/su ircd --shell=/bin/sh -c ' /nix/store/grii6znymhv7rjfk2gp47c42bzj7gxpy-ircd-hybrid-8.2.45/bin/ircd -configfile /nix/store/7a54cd81klvx50h8hpjp49777h60p1bq-ircd-hybrid-service/conf/ircd.conf </dev/null -logfile /home/ircd/ircd.log' 2>&1 >/var/log/ircd-hybrid.out
	fi;
fi

if test "$1" = "stop" ; then 
	/nix/store/9bzy8ydbfsg3gkk11wcaxaj5kmgvp9s9-procps-4.0.4/bin/pkill ircd;
fi;

The problem line is: while ! @iproute@/sbin/ip addr |.

Things done

• Built on platform(s)
  • x86_64-linux
  • aarch64-linux
  • x86_64-darwin
  • aarch64-darwin
• For non-Linux: Is sandboxing enabled in nix.conf? (See Nix manual)
  • sandbox = relaxed
  • sandbox = true
• Tested, as applicable:
  • NixOS test(s) (look inside nixos/tests)
  • and/or package tests
  • or, for functions and "core" functionality, tests in lib/tests or pkgs/test
  • made sure NixOS tests are linked to the relevant packages
• Tested compilation of all packages that depend on this change using nix-shell -p nixpkgs-review --run "nixpkgs-review rev HEAD". Note: all changes have to be committed, also see nixpkgs-review usage
• Tested basic functionality of all binary files (usually in ./result/bin/)
• 25.05 Release Notes (or backporting 24.11 and 25.05 Release notes)
  • (Package updates) Added a release notes entry if the change is major or breaking
  • (Module updates) Added a release notes entry if the change is significant
  • (Module addition) Added a release notes entry if adding a new NixOS module
• Fits CONTRIBUTING.md.

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