Resolve "Thread pool"

Closes #34 (closed)

• make mthread works
• cut mthread to be just a thread stack

src/main/server.c

@@ -57,7 +57,7 @@ main(int argc, char *argv[])
 
 normal_launch:
     LOG_INFO("Lektor launched by user %s (shell: %s, home: %s)", pw->pw_name, pw->pw_shell, pw->pw_dir);
-    // mthread_init();
+    mthread_init();
 
     return lkt_listen();
 }