turbobit (download): set DOWNLOAD_SUCCESSIVE_INTERVAL to 10 min

Actual enforced wait times differ a bit but 10 minutes currently
is the minimum observed for free users. Wait time for premium
users stays at 0 for we don't know better and try to avoid
unnessesary slow down.
shareonline_biz (probe): fix, file ID can be longer than 10 digits
core (translate_size): also accept 'B' as unit for byte values
turbobit: add probe support