Revert "Allow the user ot listen on all addresses on a free port."

This reverts commit 9f2c918c

, which
was committed before it passed all unit tests.  Reverting to address
those tests.

Change-Id: If0034716e317bd6f4b1b7ed2563e7981b05cf71f
Reviewed-by: Continuous Integration (KDAB) <build@kdab.com>
Reviewed-by: Allen Winter <allen.winter@kdab.com>
Reviewed-by: Giuseppe D'Angelo <giuseppe.dangelo@kdab.com>

src/remoteobjects/qconnectionserverfactory.cpp

@@ -185,16 +185,14 @@ QUrl TcpServerImpl::address() const
 bool TcpServerImpl::listen(const QUrl &address)
 {
     QHostAddress host(address.host());
-    if (host.isNull())
-        host = QHostAddress::Any;
-
-    bool ret = m_server.listen(host, address.port());
-    if (ret) {
-        m_originalUrl.setScheme(QLatin1String("tcp"));
-        m_originalUrl.setHost(m_server.serverAddress().toString());
-        m_originalUrl.setPort(m_server.serverPort());
+    if (host.isNull()) {
+        const QList<QHostAddress> addresses = QHostInfo::fromName(address.host()).addresses();;
+        Q_ASSERT(addresses.size() >= 1);
+        host = addresses.first();
+        m_originalUrl = address;
     }
-    return ret;
+
+    return m_server.listen(host, address.port());
 }
 
 QAbstractSocket::SocketError TcpServerImpl::serverError() const