P2pool-vtc

This release hard forks the p2pool network to Lyra2REv3 for Vertcoin. It will be required from block 1080001.

I have included a signature for the binary, signed with my [pgp key](https://pgp.mit.edu/pks/lookup?op=vindex&search=0x425776E2F9E5BAB8).

This release of P2Pool-VTC hard forks both P2Pool networks to add bech32 and p2sh payout address support (thanks to Deluxe for their PR 30).

I have included a signature for the binary, signed with my [pgp key](http://keyserver.ubuntu.com:11371/pks/lookup?op=vindex&fingerprint=on&search=0x04E9BCFB4E777CA3).

This update vastly improves the memory footprint of p2pool (thanks to pknight! https://github.com/vertcoin/p2pool-vtc/pull/22) and removes Vertcoin network 3 (which was defunct anyway).

I have included a signature for the binary, signed with my [pgp key](http://keyserver.ubuntu.com:11371/pks/lookup?op=vindex&fingerprint=on&search=0x04E9BCFB4E777CA3).

This is the second release candidate for an update to p2pool that includes the changes required for it to be compatible with Vertcoin Core 0.12. It also includes better vardiff options that are optionally enabled via the `--miner-share-rate`, `--address-share-rate` and `--min-difficulty` flags. Over the previous RC this pre-release fixes a bug causing valid shares to be reported as invalid to the miner.

- Using `--miner-share-rate 4` would target a pseudoshare (the Yes!!!! you see from vertminer) rate of four per minute per connected miner.
- `--address-share-rate` is the same as above except per address rather than per miner.
- `--min-difficulty` allows you to set the minimum offered pseudoshare difficulty making p2pool compatible with NiceHash where a very high minimum difficulty of sixteen or above is required.

I have included a signature for the binary, signed with my [pgp key](http://keyserver.ubuntu.com:11371/pks/lookup?op=vindex&fingerprint=on&search=0x04E9BCFB4E777CA3).

This update to p2pool includes the changes required for it to be compatible with Vertcoin Core 0.12. It also includes better vardiff options that are optionally enabled via the `--miner-share-rate`, `--address-share-rate` and `--min-difficulty` flags.

- Using `--miner-share-rate 4` would target a pseudoshare (the Yes!!!! you see from vertminer) rate of four per minute per connected miner.
- `--address-share-rate` is the same as above except per address rather than per miner.
- `--min-difficulty` allows you to set the minimum offered pseudoshare difficulty making p2pool compatible with NiceHash where a very high minimum difficulty of sixteen or above is required.

Updates bootstrap nodes for networks one and two.