client.h

UPDATEOPTION will be used to check if the client was called with update
option. In this case, the client will only check for updates. Without this
option, there will be no check.

Signed-off-by: ERIK ALEXANDRE PUCCI <eap08@c3sl.ufpr.br>
Acked-by: Bruno Ribas <ribas@c3sl.ufpr.br>
Acked-by: Diego Giovane Pasqualin <dgp06@c3sl.ufpr.br>
Signed-off-by: Danilo K. S. Yorinori <danilok@c3sl.ufpr.br>