gssapi: added SSH constants

Reviewed-by: Andreas Schneider <asn@cryptomilk.org>

include/libssh/ssh2.h

@@ -30,7 +30,14 @@
 #define SSH2_MSG_USERAUTH_PK_OK 60
 #define SSH2_MSG_USERAUTH_PASSWD_CHANGEREQ 60
 #define SSH2_MSG_USERAUTH_INFO_REQUEST	 60
+#define SSH2_MSG_USERAUTH_GSSAPI_RESPONSE 60
 #define SSH2_MSG_USERAUTH_INFO_RESPONSE 61
+#define SSH2_MSG_USERAUTH_GSSAPI_TOKEN 61
+#define SSH2_MSG_USERAUTH_GSSAPI_EXCHANGE_COMPLETE 63
+#define SSH2_MSG_USERAUTH_GSSAPI_ERROR 64
+#define SSH2_MSG_USERAUTH_GSSAPI_ERRTOK 65
+#define SSH2_MSG_USERAUTH_GSSAPI_MIC 66
+
 #define SSH2_MSG_GLOBAL_REQUEST 80
 #define SSH2_MSG_REQUEST_SUCCESS 81
 #define SSH2_MSG_REQUEST_FAILURE 82