Revert "Rate limit proxy recruiting to one thread at a time"

This reverts commit d8eaa0b4e9.

src/generator.c

@@ -107,7 +107,6 @@ struct proxy_instance {
 	bool disabled; /* Subproxy no longer to be used */
 	bool reconnect; /* We need to drop and reconnect */
 	bool reconnecting; /* Testing in progress */
-	bool recruiting; /* Recruiting in progress */
 	bool alive;
 
 	mutex_t notify_lock;
@@ -1699,7 +1698,6 @@ static void *proxy_recruit(void *arg)
 		store_proxy(gdata, proxy);
 	} else
 		add_subproxy(parent, proxy);
-	parent->recruiting = false;
 	return NULL;
 }
 
@@ -1707,9 +1705,6 @@ static void recruit_subproxy(proxy_instance_t *proxi)
 {
 	pthread_t pth;
 
-	if (proxi->recruiting)
-		return;
-	proxi->recruiting = true;
 	create_pthread(&pth, proxy_recruit, proxi);
 }