* cmd/bzzd: add missing p2p/discovery flags
* cmd/bzzd: fix two bugs crashing bzzd if bootnodes flag given
* cmd/bzzd: make no swap default, renamed flag bzznoswap->bzzswap
* internal/web3ext: correct methods for bzz IPC module
* cmd/bzzd: ethapi param not mandatory. Warning if no blockchain
* cmd/bzzd: correct default IPC modules in help string
* cmd/utils: fix help description for networkId - add Ropsten
* cmd/bzz, swarm/api, swarm/network: add swarm networkId flag
* cmd/bzzd: change nosync flag to sync and BootTFlag

Improve hex encoding/decoding

build: use single CocoaPods package, pre-release dev builds

common.Address JSON encoding now enforces the 0x prefix, but key files
don't have the prefix.

The new package is purpose-built to handle the encoding consumed and
produced by the RPC API.

Fixed unwinding of bad hashes when already on the canon chain

accounts: disable file system watcher on windows

internal/build: use 'git tag --points-at' to get the current tag

The watcher is unreliable and causes test failures on Windows.
Disable it until we have a better solution.

This should restore support for building with git 1.x.

Prevent relay of invalid IPs, add --netrestrict

common/registrar, eth: removed registrar (tech debt)

Makefile, build: do proper mobile builds, not cross builds

The registrar was broken, unmaintained and there is a much better
replacement: ENS.

(cherry picked from commit 6ca8f57b08d550613175260cab7633adcacbe6ab)

(cherry picked from commit d54ad55c6079ae6eab93d7f34ce5c4ec829f8e5b)

core, core/state: fixed consensus issue added touch revert

Implemented proper touch revert journal entries and copied a Parity
consensus bug in order to remain in sync with the current longest chain.