Fixes Issue 300 Endless recursion 'Configuration file does not exist'
Resolved differences between paths (log,config,home) pointing to different users' home folders
(`logfile` and `config_file` were pointing to 'user/.ooni/...' and `ooni_home` to 'root/.ooni/...')
Merge pull request #301 from olafmk/master

Fixes Issue 300 Endless recursion 'Configuration file does not exist'