SSH: Fix key re-exchange bug.

We used the encrypted client payload by mistake. The bug only manifests
itself from the second key exchange on, because during the first one,
no encryption is active, so the "encrypted" payload is the same as
the non-encrypted one.

src/libs/utils/ssh/sshpacket.cpp

@@ -86,12 +86,10 @@ SshPacketType AbstractSshPacket::type() const
     return static_cast<SshPacketType>(m_data.at(TypeOffset));
 }
 
-AbstractSshPacket::Payload AbstractSshPacket::payLoad() const
+QByteArray AbstractSshPacket::payLoad() const
 {
-    Payload p;
-    p.data = m_data.constData() + PayloadOffset;
-    p.size = length() - paddingLength() - 1;
-    return p;
+    return QByteArray(m_data.constData() + PayloadOffset,
+        length() - paddingLength() - 1);
 }
 
 void AbstractSshPacket::printRawBytes() const