* cleanup
* upbork
* review grumble: rename client id prefix
* rpc-tests: make one of the clients open-ethereum
* fix doctest
* README: mention clang version and that our wiki is old
Previous version put $BASE directory in root directory.
This version clearly explains how to run as root or as specific user.
Additional configuration:
* send SIGHUP for clean exit,
* restart on fail.
Tested on Ubuntu 16.04.3 LTS with 4.10.0-33-generic x86_64 kernel