2.1.0-32

• update to libtorrent master
• lt:don't hint POSIX_FADV_RANDOM
• lt:allow connections while checking resume data if no_verify_files flag is
  set
• lt:fix BEP-40 peer priority for IPv6
• lt:limit the piece size in create_torrent constructor
• lt:set m_file_priority early, to make open_file() work as expected.
• lt:don't discard netlink messages for previously seen addresses
• lt:fix issue when closing a uTP connection with a close reason and picking
  up a nagle packet.
• lt:apply DSCP setting to peers before connecting
• lt:check settings_pack::max_out_request_queue before alerting performance
  warning: max outstanding piece requests reached
• lt:check settings_pack::max_out_request_queue before alert
  outstanding_request_limit_reached
• lt:updated libdatachannel to v0.21.2
• lt:make anti-leech choker never increase score for dishonesty
• lt:try encode web seed redirect location
• lt:send read_piece right at the end of piece_passed
• lt:fix integer overflow in piece picker
• lt:try harder to bind TCP and UDP sockets to the same port
• lt:torrent_status::num_pieces counts pieces passed hash check, as documented
• lt:add feature to enable interruption of disk I/O worker threads
• lt:pass in whether a torrent has v1 and/or v2 hashes in storage_params
• lt:reject resume data if it contains mismatching info hashes
• lt:restore file priorities in POSIX storage
• lt:fix the wrong port is being announced to tracker
• lt:allow I2P leaseset encryption type 4
• lt:allow execution of on_unknown_torrent method in the absence of active
  torrents
• lt:fix assert in uTP resend_packet()
• lt:improve checking and testing of max piece size
• lt:source code cleanup, performance and stability