network: validate donation address for server
network: validate donation address for server

neocogent/electrum,fujicoin/electrum-fjc,pooler/electrum-ltc,vialectrum/vialectrum,wakiyamap/electrum-mona,spesmilo/electrum,vialectrum/vialectrum,spesmilo/electrum,fujicoin/electrum-fjc,fujicoin/electrum-fjc,pooler/electrum-ltc,wakiyamap/electrum-mona,neocogent/electrum,wakiyamap/electrum-mona,vialectrum/vialectrum,spesmilo/electrum,neocogent/electrum,wakiyamap/electrum-mona,pooler/electrum-ltc,spesmilo/electrum,pooler/electrum-ltc