(make_server_session): Deleted user argument.
(open_session): Deleted user attribute.
(make_open_session): Deleted user argument.
(server_connection_service): #if:ed out
(spawn_process): Added user argument.
(do_alloc_pty): Use CAST macro. Get the user from the connection
object.
(pty_request_handler): Statically allocated object, replaces the
make_pty_handler function.

Rev: src/server_session.c:1.42
Rev: src/server_session.h:1.12