nixos/hostapd: add logLevel option

nixos/modules/services/networking/hostapd.nix

@@ -24,9 +24,9 @@ let
 
     # logging (debug level)
     logger_syslog=-1
-    logger_syslog_level=2
+    logger_syslog_level=${toString cfg.logLevel}
     logger_stdout=-1
-    logger_stdout_level=2
+    logger_stdout_level=${toString cfg.logLevel}
 
     ctrl_interface=/run/hostapd
     ctrl_interface_group=${cfg.group}
@@ -145,6 +145,19 @@ in
         '';
       };
 
+      logLevel = mkOption {
+        default = 2;
+        type = types.int;
+        description = ''
+          Levels (minimum value for logged events):
+          0 = verbose debugging
+          1 = debugging
+          2 = informational messages
+          3 = notification
+          4 = warning
+        '';
+      };
+
       countryCode = mkOption {
         default = null;
         example = "US";