Merge pull request #249168 from arcnmx/mainPrograms

pkgs/os-specific/linux/mdadm/default.nix

···
     description = "Programs for managing RAID arrays under Linux";
     homepage = "http://neil.brown.name/blog/mdadm";
     license = licenses.gpl2;
+    mainProgram = "mdadm";
     maintainers = with maintainers; [ ekleog ];
     platforms = platforms.linux;
   };

pkgs/servers/tailscale/default.nix

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     homepage = "https://tailscale.com";
     description = "The node agent for Tailscale, a mesh VPN built on WireGuard";
     license = licenses.bsd3;
+    mainProgram = "tailscale";
     maintainers = with maintainers; [ danderson mbaillie twitchyliquid64 jk ];
   };
 }

pkgs/tools/misc/tmux/default.nix

···
     changelog = "https://github.com/tmux/tmux/raw/${finalAttrs.version}/CHANGES";
     license = lib.licenses.bsd3;
     platforms = lib.platforms.unix;
+    mainProgram = "tmux";
     maintainers = with lib.maintainers; [ thammers fpletz srapenne ];
   };
 })