Added NETCONF 1.1 capability to client

This fixes a deadlocking issue where the Session would expect the
framing protocol to be used if ServerCapabilities contained 1.1,
but the server would actually be using the legacy protocol as the
client only advertised that it supported 1.0

Author: Jason Larke

src/Renci.SshNet/Netconf/NetConfSession.cs

@@ -44,6 +44,9 @@ public NetConfSession(ISession session, int operationTimeout)
                                                         "<capability>" +
                                                             "urn:ietf:params:netconf:base:1.0" +
                                                         "</capability>" +
+                                                        "<capability>" +
+                                                            "urn:ietf:params:netconf:base:1.1" +
+                                                        "</capability>" +
                                                     "</capabilities>" +
                                                 "</hello>");