--uri-selector=SELECTOR Specify URI selection algorithm.
If 'inorder' is given, URI is tried in the order
appeared in the URI list.
If 'feedback' is given, aria2 uses download speed
observed in the previous downloads and choose
fastest server in the URI list. This also
effectively skips dead mirrors. The observed
download speed is a part of performance profile
of servers mentioned in --server-stat-of and
--server-stat-if options.
If 'adaptive' is given, selects one of the best
mirrors for the first and reserved connections.
For supplementary ones, it returns mirrors which
has not been tested yet, and if each of them has
already been tested, returns mirrors which has to
be tested again. Otherwise, it doesn't select
anymore mirrors. Like 'feedback', it uses a
performance profile of servers.
