__BITCOIN_ID doesn't test for SegWit addresses that start with bc1

[Mark London]

Hi - I just got a BITCOIN blackmail spam that avoided detection, because 
it used a SegWit bitcoin address, that starts with a bc1:

bc1q0q7u8a7735za93um20yk5ynphdnpvenj0k0ufn
This format is explained here:

https://changelly.com/blog/bitcoin-addresses-types-and-meaning/

I guess the definition of __BITCOIN_ID needs to updated to include this 
format.  Thanks.

- Mark