* Config: fix don't create empty dir when resolving path
* refactor migration of default config file
* gracefully handle src == target on Move
* create target directory on Move, if necessary
* unify resolution of default config location
* refactor the use of flagSet to be explicit
* remove package variable
* use empty config file path setting if not set in flags
* resolve default file location the same way when showing the target and
when loading default config file
* don't migrate if target file is the same as source
* rename configfile to configFile
* add migrateConfig tests
8c86aac21d