Darvaza Fork: GIP 29 & 30

[jmank88]

The Darvaza fork implements gochain/gips/issues/30 (Burn all gas fees), and automates gochain/gips/issues/29 (Increase minimum gas price by 1000x) at the same time.

• [x] Implementation #420 (^v3.4.1)

Effective blocks:

• [x] testnet 16811000
• [x] mainnet 17900000 (March 17th, 2pm UTC)

Testnet testing

We'll want to try common wallets and tools to ensure they don't have some kind of thing that limits gas prices.

• [x] Test metamask
• [ ] Test trust wallet
• [x] Test web3 cli
• [ ] Test web3.js
• [x] Explorer wallet (private key)
• [x] Turbo Wallet
• [ ] others?

[jmank88]

The implementation is complete and will take effect on the testnet at block # 16811000 (around unix time ~1614371340 or Fri Feb 26 2021 20:29:00 GMT+0000).

[treeder]

Added a few tools/clients to test to this ticket.