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

src/storage/plugins/CurlStorage.cxx

@@ -138,7 +138,7 @@ protected:
 
 		request.Stop();
 		done = true;
-		cond.signal();
+		cond.notify_one();
 	}
 
 	void LockSetDone() {

src/storage/plugins/NfsStorage.cxx

@@ -138,7 +138,7 @@ private:
 
 		const std::lock_guard<Mutex> protect(mutex);
 		state = _state;
-		cond.broadcast();
+		cond.notify_all();
 	}
 
 	void SetState(State _state, std::exception_ptr &&e) noexcept {
@@ -147,7 +147,7 @@ private:
 		const std::lock_guard<Mutex> protect(mutex);
 		state = _state;
 		last_exception = std::move(e);
-		cond.broadcast();
+		cond.notify_all();
 	}
 
 	void Connect() noexcept {

src/storage/plugins/UdisksStorage.cxx

@@ -147,7 +147,7 @@ UdisksStorage::SetMountPoint(Path mount_point)
 
 	mount_error = {};
 	want_mount = false;
-	cond.broadcast();
+	cond.notify_all();
 }
 
 void
@@ -188,7 +188,7 @@ UdisksStorage::OnListReply(ODBus::Message reply) noexcept
 		const std::lock_guard<Mutex> lock(mutex);
 		mount_error = std::current_exception();
 		want_mount = false;
-		cond.broadcast();
+		cond.notify_all();
 		return;
 	}
 
@@ -247,7 +247,7 @@ try {
 	const std::lock_guard<Mutex> lock(mutex);
 	mount_error = std::current_exception();
 	want_mount = false;
-	cond.broadcast();
+	cond.notify_all();
 }
 
 void
@@ -266,7 +266,7 @@ try {
 	const std::lock_guard<Mutex> lock(mutex);
 	mount_error = std::current_exception();
 	want_mount = false;
-	cond.broadcast();
+	cond.notify_all();
 }
 
 void
@@ -306,7 +306,7 @@ try {
 	const std::lock_guard<Mutex> lock(mutex);
 	mount_error = std::current_exception();
 	mounted_storage.reset();
-	cond.broadcast();
+	cond.notify_all();
 }
 
 void
@@ -318,12 +318,12 @@ try {
 	const std::lock_guard<Mutex> lock(mutex);
 	mount_error = {};
 	mounted_storage.reset();
-	cond.broadcast();
+	cond.notify_all();
 } catch (...) {
 	const std::lock_guard<Mutex> lock(mutex);
 	mount_error = std::current_exception();
 	mounted_storage.reset();
-	cond.broadcast();
+	cond.notify_all();
 }
 
 std::string