OpenBSD does not support IPv4 mapped IPv6 addresses, so QHostAddress::Any
listens only on IPv6. Use the IPv4 any-address instead.

Index: core/backends/lan/compositeuploadjob.cpp
--- core/backends/lan/compositeuploadjob.cpp.orig
+++ core/backends/lan/compositeuploadjob.cpp
@@ -69,7 +69,7 @@ void CompositeUploadJob::start()
 bool CompositeUploadJob::startListening()
 {
     m_port = MIN_PORT;
-    while (!m_server->listen(QHostAddress::Any, m_port)) {
+    while (!m_server->listen(QHostAddress::AnyIPv4, m_port)) {
         m_port++;
         if (m_port > MAX_PORT) { // No ports available?
             qCWarning(KDECONNECT_CORE) << "CompositeUploadJob::startListening() - Error opening a port in range" << MIN_PORT << "-" << MAX_PORT;
