treewide: minor format / style / documentation fixes

nixos/modules/services/networking/bind.nix

@@ -145,7 +145,7 @@ in
       };
 
     systemd.services.bind = {
-      description = "BIND name server job";
+      description = "BIND Domain Name Server";
       after = [ "network.target" ];
       wantedBy = [ "multi-user.target" ];
 
@@ -155,6 +155,7 @@ in
       '';
 
       script = "${pkgs.bind.bin}/sbin/named -u ${bindUser} ${optionalString cfg.ipv4Only "-4"} -c ${cfg.configFile} -f";
+      unitConfig.Documentation = "man:named(8)";
     };
   };
 }