Rename constants, variables, classes, methods, functions
Some ideas are in https://pad.riseup.net/p/rGfvR7ZsvtoZ.
It would be nice to create first a list of all the things to rename and the proposed new names.
It should be done file for file as possible and be reviewed/merged fast to avoid many merge conflicts.
Only a part of this was https://github.com/torproject/sbws/issues/202.