-O and --remote-name-all

[JosuaKrause]

The granularity and complexity of -O, --remote-name, and --remote-name-all is not yet correctly reflected by curl-chk. Normally -O, --remote-name acts on one file at a time and --remote-name-all acts on all files. But eg. --remote-name-all can be deactivated using -o - or --no-remote-name. Further investigation is needed. I doubt people are actually using the complexity to its fullest...