improve argparse usage

Use --fatcat-api-url instead of (ambiguous) --host-url for commands that
aren't deployed/running via systemd.

TODO: update the other --host-url usage, and either roll-out change
consistently or support the old arg as an alias during cut-over

Use argparse.ArgumentDefaultsHelpFormatter (thanks Martin!)

Add help messages for all sub-commands, both as documentation and as a
way to get argparse to print available commands in a more readable
format.

0 files changed, 0 insertions, 0 deletions