changelog:

1.2.0.19

• libtorrent release 1.2.0
• using android NDK r18b
• updated to boost 1.69.0
• updated to OpenSSL 1.1.1a
• fixed activeDhtLimit SettingsPack setter
• development: new local build scripts for macosx, android
• lt:only allow cwnd to be reduced so often (utp)
• lt:avoid announcing local ip to private tracker
• lt:don’t treat loss of MTU probe packet as a congestion signal (utp)
• lt:make sure we reset the duplicate ack counter every time we don’t receive
  a duplicate ack (utp)
• lt:remove old (incompatible) sequence number build option (utp)
• lt:don’t leave slow-start just because we hit the advertized receive window
• lt:simplify and improve the uTP deferred ACK logic to respond earlier
• lt:improve logic for fast-retransmitting packets on incoming SACK
• lt:improve utp verbose logging a bit and make the parser pull out more
  metrics
• lt:restore permissions on directories to 1.1. i.e. rely on umask
• lt:minor fix to invalid_request_alert logging
• lt:add assignment operator to span
• lt:fix %u -> %d format codes
• lt:fix deprecation markup in torrent_status
• lt:tweak heuristic of how to interpret url seeds in multi-file torrents
• lt:added more TORRENT_DEPRECATED_ENUM and deprecated unused aio_max in
  settings_pack
• lt:take a string_view in setting_by_name
• lt:fix typo in peer log
• lt:deprecate start_default_features flag, it’s only used in deprecated API
• lt:remove verbose peer logging
• lt:make stack_allocator::format_string() grow the buffer for large strings
• lt:move where socket buffers are set up, to happen after the socket is
  opened. log errors in the peer’s log instead of session and torrent
• lt:add stats counter for the number of outstanding async_accept calls
• lt:fix potential issue where the dht port message is sent before the peer
  handshake
• lt:correct %u format code for pieces in printf() calls
• lt:attempt to fix an assert for a newly connected peer that disconnects just
  as we receive the metadata
• lt:don’t use page aligned disk buffers
• lt:include &ipv4= for private trackers
• lt:add support for &ipv4= tracker argument
• lt:use new bdecoder in ut_metadata class
• lt:fix redundant bytes overflow
• lt:check for self-assignment in bitfield operator=
• lt:initialize bencoded ints with zero when constructed
• lt:exit natpmp::on_reply earlier if we’re shutting down
• lt:fix setting ipv6 interface
• lt:a better fix to the ssl port announce bug
• lt:perfect forward async handlers for udp_socket to underlying asio socket
• lt:move the whole add_torrent_params object into save_resume_data_alert
• lt:actually fix the issue with the second tracker announce with port 0
• lt:remove redundant MTU boundary checks
• lt:fix of asio-debugging build in natpmp. resend_request could be called
  directly, not only as a handler for an async operation
• lt:fix move_storage with save_path with a trailing slash
• lt:only make snubbed peers invert the piece picking strategy when we’re
  doing rarest first
• lt:ssl listen port fix and improved tracker announce logging
• lt:properly tear down the disk_io_thread object in set_piece_hashes() when
  exiting via an exception
• lt:make throwing versions of read_resume_data
• lt:fix overflow in sliding_average in the case of very high download rates
• lt:renamed debug_notification to connect_notification
• lt:fix issue in udp_socket with unusual socket failure
• lt:utp close-reason use after free fix
• lt:source code cleanup, performance and stability