s/MONGOOSE_NO_THREADS/MONGOOSE_ENABLE_THREADS

docs/Embed.md

@@ -149,7 +149,7 @@ all Net Skeleton functions will be available too.
     -DMONGOOSE_NO_DIRECTORY_LISTING  Disable directory listing
     -DMONGOOSE_NO_FILESYSTEM    Disables all file IO, serving from memory only
     -DMONGOOSE_NO_LOGGING       Disable access/error logging
-    -DMONGOOSE_NO_THREADS
+    -DMONGOOSE_ENABLE_THREADS   Enable mg_start_thread() function
     -DMONGOOSE_NO_WEBSOCKET     Disable WebSocket support
     -DMONGOOSE_NO_USER          No concept of a user on used platform.
                                 (Platform does not provide getpwnam, setgid or setuid)

mongoose.c

@@ -1561,11 +1561,11 @@ static const struct {
   {NULL,  0, NULL}
 };
 
-#ifndef MONGOOSE_NO_THREADS
+#ifdef MONGOOSE_ENABLE_THREADS
 void *mg_start_thread(void *(*f)(void *), void *p) {
   return ns_start_thread(f, p);
 }
-#endif  // MONGOOSE_NO_THREADS
+#endif  // MONGOOSE_ENABLE_THREADS
 
 #ifndef MONGOOSE_NO_MMAP
 #ifdef _WIN32