Use encodingKludge for all os calls to prevent any problems downloading ...

...the new zoneinfo file on some systems

I think this could be the reason the zonefile doesn't update on some systems like: 
https://github.com/mr-orange/Sick-Beard/issues/646
because there is special char (@) in the log in the path in that issue report. Without ek (encodingKludge) this can result in errors.