Fixes #274.
GIUGQKVRMT7BMVF5FKCINDJMTLUG6S5TCKDIPY3U76OS74VP3QSQC
my $storeMode = $c->config->{store_mode} // "direct";
my $channelUri =
$storeMode eq "direct" ? $c->uri_for('/')
: $storeMode eq "s3-binary-cache" ?
($c->config->{binary_cache_public_uri} // ("https://" . $c->config->{binary_cache_s3_bucket} . ".s3.amazonaws.com/"))
: die "Not supported.\n";