Use host(name) to construct the SSLSocket

in XMPPTCPConnection.

So that the hostname and not the IP is available to the SSLSocket and
the SSLSession, which handed over to HostnameVerifier. This leaves the
HostnameVerifier with the

- name of the XMPP service (first argument of verify(String, SSLSession)
- name of the used host (found in the SSLSession)

allowing more complex verification mechanisms performed by the
HostnameVerifier.

smack-tcp/src/main/java/org/jivesoftware/smack/tcp/XMPPTCPConnection.java

@@ -721,7 +721,7 @@ public class XMPPTCPConnection extends AbstractXMPPConnection {
         Socket plain = socket;
         // Secure the plain connection
         socket = context.getSocketFactory().createSocket(plain,
-                plain.getInetAddress().getHostAddress(), plain.getPort(), true);
+                host, plain.getPort(), true);
         // Initialize the reader and writer with the new secured version
         initReaderAndWriter();