bbbike-org-download.t: original bbbike data has no meta.yml

Skip the meta.yml check in case the random chooser has picked the
"data" city (which contains the original bbbike data).
cgihead.t: work with "soft timeouts"

In LWP it's not possible to change the timeout while maintaining
keep_alive connections, so the logic is now rewritten to have a
maximum hard timeout, and fail when exceeding soft timeouts.
data update (minor)