Remove CWMP_KEEP_ALIVE_TIMEOUT

This turned out not to be necessary. Will use SESSION_TIMEOUT for
connection timeout.

lib/config.ts

@@ -48,7 +48,6 @@ const options = {
   CWMP_SSL_KEY: { type: "string", default: "" },
   CWMP_LOG_FILE: { type: "path", default: "" },
   CWMP_ACCESS_LOG_FILE: { type: "path", default: "" },
-  CWMP_KEEP_ALIVE_TIMEOUT: { type: "int", default: 0 },
 
   NBI_WORKER_PROCESSES: { type: "int", default: 0 },
   NBI_PORT: { type: "int", default: 7557 },

lib/server.ts

@@ -56,7 +56,7 @@ export function start(
   ssl,
   _listener,
   onConnection?,
-  keepAliveTimeout: number = 0
+  keepAliveTimeout: number = -1
 ): void {
   listener = _listener;
 
@@ -77,7 +77,7 @@ export function start(
     if (onConnection != null) server.on("connection", onConnection);
   }
 
-  if (keepAliveTimeout) server.keepAliveTimeout = keepAliveTimeout;
+  if (keepAliveTimeout >= 0) server.keepAliveTimeout = keepAliveTimeout;
   server.listen(port, networkInterface);
 }