Adding options to enable bitlbee and slack gateways in znc config.

nixos/modules/services/networking/znc.nix

@@ -50,9 +50,12 @@ let
             ${ lib.concatStringsSep "\n" (lib.mapAttrsToList (name: net: ''
               <Network ${name}>
                   ${concatMapStrings (m: "LoadModule = ${m}\n") net.modules}
-                  Server = ${net.server} ${if net.useSSL then "+" else ""}${toString net.port}
-
+                  Server = ${net.server} ${lib.optionalString net.useSSL "+"}${toString net.port} ${net.password}
                   ${concatMapStrings (c: "<Chan #${c}>\n</Chan>\n") net.channels}
+                  ${lib.optionalString net.hasBitlbeeControlChannel ''
+                    <Chan &bitlbee></Chan>
+                  ''}
+                  ${net.extraConf}
               </Network>
               '') confOpts.networks) }
     </User>
@@ -85,6 +88,23 @@ let
         '';
       };
 
+      userName = mkOption {
+        default = "";
+        example = "johntron";
+        type = types.string;
+        description = ''
+          A nick identity specific to the IRC server.
+        '';
+      };
+
+      password = mkOption {
+        type = types.str;
+        default = "";
+        description = ''
+          IRC server password, such as for a Slack gateway.
+        '';
+      };
+
       useSSL = mkOption {
         type = types.bool;
         default = true;
@@ -119,6 +139,31 @@ let
           IRC channels to join.
         '';
       };
+
+      hasBitlbeeControlChannel = mkOption {
+        type = types.bool;
+        default = false;
+        description = ''
+          Whether to add the special Bitlbee operations channel.
+        '';
+      };
+
+      extraConf = mkOption {
+        default = "";
+        type = types.lines;
+        example = ''
+          Encoding = ^UTF-8
+          FloodBurst = 4
+          FloodRate = 1.00
+          IRCConnectEnabled = true
+          Ident = johntron
+          JoinDelay = 0
+          Nick = johntron
+        '';
+        description = ''
+          Extra config for the network.
+        '';
+      };
     };
   };