Added new constant RSA_PUB_SIZE.
Added new constant RSA_PUB_SIZE.

This constant is here for when we want to store the a public key in a
string (in the database for instance).

Signed-off-by: Loudet Julien <d2157eb68b9abf11608c0d783d958650513925aa@gmail.com>

Ljinod/PJL381-SIPD