allow configuring number of signatures in stealth-addr command.
allow configuring number of signatures in stealth-addr command.

libmetrocoin/libmetrocoin-explorer,tuomassiren/libbitcoin-explorer,BWallet/sx,cancoin/libbitcoin-explorer,libtetcoin/libtetcoin-explorer,BWallet/sx,GroestlCoin/libgroestlcoin-explorer,libmetrocoin/libmetrocoin-explorer,cancoin/libbitcoin-explorer,GroestlCoin/libgroestlcoin-explorer,BWallet/sx,libtetcoin/libtetcoin-explorer,GroestlCoin/libgroestlcoin-explorer,tuomassiren/libbitcoin-explorer