Merge pull request #2226 from fjl/eip-8

crypto/ecies/ecies.go

crypto/ecies/ecies_test.go

p2p/discover/udp.go

p2p/discover/udp_test.go

p2p/message_test.go

p2p/peer.go

p2p/rlpx.go

p2p/rlpx_test.go

rlp/decode.go

rlp/decode_tail_test.go

rlp/decode_test.go

rlp/encode.go

rlp/encode_test.go

rlp/typecache.go