Most notable changes since version 1:
- 'operatorurl' got renamed to 'url'
- "verifyurl" field simplified/replaced with "proof" (no longer requires a webserver)
- email field is no longer mandatory
- UTF-8 support added (punycode for IDN))
- xmr (monero) field added
- bitcoin field renamed to btc
- zcash field renamed to zec
- PGP keys should be on keys.openpgp.org (verifying keyserver)
- removed fields: KIST, ricochet