thread/*Cond: rename methods to match std::condition_variable

src/lib/nfs/Blocking.hxx

@@ -61,7 +61,7 @@ private:
 	bool LockWaitFinished() noexcept {
 		const std::lock_guard<Mutex> protect(mutex);
 		while (!finished)
-			if (!cond.timed_wait(mutex, timeout))
+			if (!cond.wait_for(mutex, timeout))
 				return false;
 
 		return true;
@@ -74,7 +74,7 @@ private:
 	void LockSetFinished() noexcept {
 		const std::lock_guard<Mutex> protect(mutex);
 		finished = true;
-		cond.signal();
+		cond.notify_one();
 	}
 
 	/* virtual methods from NfsLease */