To account for the possibility of the user running the script silently in the background. PAUSE would leave an instance in memory doing nothing indefinitely.
I was going to use TIMEOUT but PING performs better.
- keeps all user.js.parrot lines intact
- keeps empty lines intact
- fix for keeping `!` and `^` in non-"user_pref" lines intact
+ some other minor changes + streamlining
https://github.com/ghacksuserjs/ghacks-user.js/issues/264#issuecomment-345462158
- It can now handle read-only files.
- it is somewhat more explicit regarding what it's doing in some circumstances. For example, it now informs the user when no changes are made.
- It now accepts two parameters: `-unattended` and `-log`
- Minor improvements here and there.
