inspector: do not prompt to use localhost

There are multiple reports of Windows7 not being able to resolve
localhost on some setups (web search also confirms that). This change
will advertise "127.0.0.1" as inspector host name.

Fixes: https://github.com/nodejs/node/issues/9382
Fixes: https://github.com/nodejs/node/issues/9188
PR-URL: https://github.com/nodejs/node/pull/9451
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Michaël Zasso <targos@protonmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>

src/inspector_agent.cc

@@ -39,7 +39,7 @@ static const uint8_t PROTOCOL_JSON[] = {
 
 std::string GetWsUrl(int port, const std::string& id) {
   char buf[1024];
-  snprintf(buf, sizeof(buf), "localhost:%d/%s", port, id.c_str());
+  snprintf(buf, sizeof(buf), "127.0.0.1:%d/%s", port, id.c_str());
   return buf;
 }
 

test/inspector/test-inspector.js

@@ -11,7 +11,7 @@ function checkListResponse(err, response) {
   assert.ok(response[0]['devtoolsFrontendUrl']);
   assert.ok(
     response[0]['webSocketDebuggerUrl']
-      .match(/ws:\/\/localhost:\d+\/[0-9A-Fa-f]{8}-/));
+      .match(/ws:\/\/127.0.0.1:\d+\/[0-9A-Fa-f]{8}-/));
 }
 
 function checkVersion(err, response) {