QtNetwork: Standardize error message about IPv6 addresses for nameservers.

Add a const char * message with QDnsLookupRunnable's translation
context and use that for untranslated warnings and errorString.

Change-Id: I1b6c9fb259fb9ff824a0c3829b2c00c36aaecdfa
Reviewed-by: Richard J. Moore <rich@kde.org>

src/network/kernel/qdnslookup.cpp

@@ -148,6 +148,9 @@ static void qt_qdnsservicerecord_sort(QList<QDnsServiceRecord> &records)
     }
 }
 
+const char *QDnsLookupPrivate::msgNoIpV6NameServerAdresses =
+    QT_TRANSLATE_NOOP("QDnsLookupRunnable", "IPv6 addresses for nameservers are currently not supported");
+
 /*!
     \class QDnsLookup
     \brief The QDnsLookup class represents a DNS lookup.

src/network/kernel/qdnslookup_p.h

@@ -89,6 +89,8 @@ public:
 
     void _q_lookupFinished(const QDnsLookupReply &reply);
 
+    static const char *msgNoIpV6NameServerAdresses;
+
     bool isFinished;
     QString name;
     QDnsLookup::Type type;

src/network/kernel/qdnslookup_unix.cpp

@@ -166,9 +166,9 @@ void QDnsLookupRunnable::query(const int requestType, const QByteArray &requestN
                 ns->sin6_addr.s6_addr[i] = ipv6Address[i];
             }
 #else
-            qWarning("IPv6 addresses for nameservers is currently not supported");
+            qWarning("%s", QDnsLookupPrivate::msgNoIpV6NameServerAdresses);
             reply->error = QDnsLookup::ResolverError;
-            reply->errorString = tr("IPv6 addresses for nameservers is currently not supported");
+            reply->errorString = tr(QDnsLookupPrivate::msgNoIpV6NameServerAdresses);
             return;
 #endif
         }

src/network/kernel/qdnslookup_win.cpp

@@ -60,9 +60,9 @@ void QDnsLookupRunnable::query(const int requestType, const QByteArray &requestN
             // For supoprting IPv6 nameserver addresses, we'll need to switch
             // from DnsQuey() to DnsQueryEx() as it supports passing an IPv6
             // address in the nameserver list
-            qWarning("IPv6 addresses for nameservers are currently not supported");
+            qWarning("%s", QDnsLookupPrivate::msgNoIpV6NameServerAdresses);
             reply->error = QDnsLookup::ResolverError;
-            reply->errorString = tr("IPv6 addresses for nameservers are currently not supported");
+            reply->errorString = tr(QDnsLookupPrivate::msgNoIpV6NameServerAdresses);
             return;
         }
     }