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Even the slightest progress causes upload to retry
if 502 client error is received, # of threads are limited to current thread

If some threads fail for some reason, download re-tries 2 more times,
provided there is some progress

copy/move [container:]<path> [container:]path

setup

store_create is only for containers now

New method: cli.utils.page_hold holds console until user input, usefull for listing
results

Create a zero-length object

if called with page_size a possitive int, print_items holds every page_size
results and waits for user input to continue.

This is used in flavor_list for the moment, but is going to be a std option
for all *_list commands

Showcase: server_info catche/manage clienterror that was
a connection error