ref: c7eae3fb729cf1831dc3f711444f2edf782a3e7d
parent: 4d4b825dea3c41bdad7d10ae32e7d04c1a3712d0
author: cinap_lenrek <cinap_lenrek@felloff.net>
date: Tue Sep 8 14:27:48 EDT 2015
tar: make z flag work, even when no file name was provided (thanks aiju) tar used to infer compression type from the filenames extension, but when no file name is given (stdin/stdout), the -z flag was ignored and no compression filter applied. this changes tar to assume the default gzip compression method when z is given and no file name is specified.