- fix piece picker bug causing double-picks with prefer-contiguous enabled
- expose session_params in python bindings
- fix (deprecated) use of add_torrent_params::info_hash
- fix issue creating and loading v2 torrents with empty files. Improves
conformance to BEP52 reference implementation
fixes merged in from the 1.2.x branch:
- improve handling of seed flag in PEX messages
- fix issue of accruing unlimited DHT node candidates when DHT is disabled
- fix bug in parsing chunked encoding
- fix incorrect reporting of active_duration when entering graceful-pause
- fix python binding for functions taking string_view
- fix python binding for torrent_info constructor overloads
- issue python deprecation warnings for some deprecated functions in the python bindings
- fix python binding for torrent_info::add_url_seed, add_tracker and add_http_seed