Fix: shared-host respawn block and web login brand placeholder

Two unrelated fixes bundled here.

1. Client respawn (ClientDll.cpp EasyRun/Run, test.cpp Run): after a host
   is shared or transferred to another server, restarting the master
   (server A) left the host's main instance stuck, because the respawn
   loop waited on IsStoped() (g_bThreadExit && GetCount()==0), which never
   becomes true while a still-alive shared instance holds AddCount(1).
   S_SERVER_EXIT now triggers an immediate reconnect without waiting for
   shared instances; client-exit / update still waits for all instances to
   drain. Verified by 100 restart cycles.

2. Web login page (WebService.cpp): the MFC web server only substituted
   __BASE_PATH__ in index.html and left __BRAND_NAME__ as a literal token
   in the login page title/heading. Substitute it with "SimpleRemoter" to
   match the original branding and the Go server's default.

Co-Authored-By: deepseek-v4-pro

server/2015Remote/WebService.cpp

@@ -245,6 +245,11 @@ void CWebService::ServerThread(int port) {
     // server's subpath deployment. The MFC server serves from the domain root,
     // so strip it (→ "") — otherwise the WebSocket/CSS/JS URLs break.
     ReplaceAll(cachedHtml, "__BASE_PATH__", "");
+    // server/web/index.html also carries a __BRAND_NAME__ placeholder for the
+    // white-label title. The Go server swaps it at serve time (defaulting to
+    // "SimpleRemoter"); the MFC server does the same here, otherwise the login
+    // page shows the literal "__BRAND_NAME__" token as <title>/<h1>.
+    ReplaceAll(cachedHtml, "__BRAND_NAME__", "SimpleRemoter");
     // Log loaded size; zero bytes means the RC BINARY resource is missing or
     // server/web/index.html was not embedded — check 2015Remote.rc and rebuild.
     Mprintf("[WebService] index.html loaded: %zu bytes\n", cachedHtml.size());