fetch & clone: do not output progress when not on a tty This adds the option "--no-progress" to fetch-pack and upload-pack, and makes fetch and clone pass this option when stdout is not a tty. While at documenting that option, also document --strict and --timeout options for upload-pack. Signed-off-by: Johannes Schindelin <Johannes.Schindelin@gmx.de> Signed-off-by: Junio C Hamano <junkio@cox.net>