Add variables used in SMPPIR to the PNAD protocol
Add three new variables to the PNAD mapping protocol: V6002, V6020 and V6003. Those variables are used in the SMPPIR project. This addition in part of the prject of unify the database of SMPPIR and SIMCAQ
Signed-off-by: Henrique V. Ehrenfried hvehrenfried@inf.ufpr.br