Added client_pty.c.x, gateway.h.x gateway_channel.c.x. Removed

client_session.c.x.

Rev: src/.dist_classes:1.16.2.3

src/.dist_classes

@@ -10,7 +10,7 @@ dist_classes = \
     client.h.x \
     client_escape.c.x \
     client_keyexchange.c.x \
-    client_session.c.x \
+    client_pty.c.x \
     client_tcpforward.c.x \
     combinators.c.x \
     command.c.x \
@@ -21,6 +21,8 @@ dist_classes = \
     crypto.h.x \
     dsa.c.x \
     exception.h.x \
+    gateway.h.x \
+    gateway_channel.c.x \
     interact.h.x \
     io.c.x \
     io.h.x \