Python-libtorrent

* fixed rare crash when purging the peer list
* fixed race condition around m_abort in session_impl
* fixed bug in web_peer_connection which could cause a hang when downloading
from web servers
* fixed bug in metadata extensions combined with encryption
* refactored socket reading code to not use async. operations unnecessarily
* some timer optimizations
* removed the reuse-address flag on the listen socket
* fixed bug where local peer discovery and DHT wouldn't be announced to without trackers
* fixed bug in bdecoder when decoding invalid messages
* added build warning when building with UNICODE but the standard library
doesn't provide std::wstring
* fixed add_node python binding
* fixed issue where trackers wouldn't tried immediately when the previous one failed
* fixed synchronization issue between download queue and piece picker
* fixed bug in udp tracker scrape response parsing
* fixed bug in the disk thread that could get triggered under heavy load
* fixed bug in add_piece() that would trigger asserts
* fixed vs 2010 build
* recognizes more clients in identify_client()
* fixed bug where trackers wouldn't be retried if they failed
* slight performance fix in disk elevator algorithm
* fixed potential issue where a piece could be checked twice
* fixed build issue on windows related to GetCompressedSize()
* fixed deadlock when starting torrents with certain invalid tracker URLs
* fixed iterator bug in disk I/O thread
* fixed FIEMAP support on linux
* fixed strict aliasing warning on gcc
* fixed inconsistency when creating torrents with symlinks
* properly detect windows version to initialize half-open connection limit
* fixed bug in url encoder where $ would not be encoded

* introduced a session state save mechanism. load_state() and save_state().
this saves all session settings and state (except torrents)
* deprecated dht_state functions and merged it with the session state
* added support for multiple trackers in magnet links
* added support for explicitly flushing the disk cache
* added torrent priority to affect bandwidth allocation for its peers
* reduced the number of floating point operations (to better support
systems without FPU)
* added new alert when individual files complete
* added support for storing symbolic links in .torrent files
* added support for uTorrent interpretation of multi-tracker torrents
* handle torrents with duplicate filenames
* piece timeouts are adjusted to download rate limits
* encodes urls in torrent files that needs to be encoded
* fixed not passing &supportcrypto=1 when encryption is disabled
* introduced an upload mode, which torrents are switched into when
it hits a disk write error, instead of stopping the torrent.
this lets libtorrent keep uploading the parts it has when it
encounters a disk-full error for instance
* improved disk error handling and expanded use of error_code in
error reporting. added a bandwidth state, bw_disk, when waiting
for the disk io thread to catch up writing buffers
* improved read cache memory efficiency
* added another cache flush algorithm to write the largest
contiguous blocks instead of the least recently used
* introduced a mechanism to be lighter on the disk when checking torrents
* applied temporary memory storage optimization to when checking
a torrent as well
* removed hash_for_slot() from storage_interface. It is now implemented
by using the readv() function from the storage implementation
* improved IPv6 support by announcing twice when necessary
* added feature to set a separate global rate limit for local peers
* added preset settings for low memory environments and seed machines
min_memory_usage() and high_performance_seeder()
* optimized overall memory usage for DHT nodes and requests, peer
entries and disk buffers
* change in API for block_info in partial_piece_info, instead of
accessing 'peer', call 'peer()'
* added support for fully automatic unchoker (no need to specify
number of upload slots). This is on by default
* added support for changing socket buffer sizes through
session_settings
* added support for merkle hash tree torrents (.merkle.torrent)
* added 'seed mode', which assumes that all files are complete
and checks hashes lazily, as blocks are requested
* added new extension for file attributes (executable and hidden)
* added support for unbuffered I/O for aligned files
* added workaround for sparse file issue on Windows Vista
* added new lt_trackers extension to exchange trackers between
peers
* added support for BEP 17 http seeds
* added read_piece() to read pieces from torrent storage
* added option for udp tracker preference
* added super seeding
* added add_piece() function to inject data from external sources
* add_tracker() function added to torrent_handle
* if there is no working tracker, current_tracker is the
tracker that is currently being tried
* torrents that are checking can now be paused, which will
pause the checking
* introduced another torrent state, checking_resume_data, which
the torrent is in when it's first added, and is comparing
the files on disk with the resume data
* DHT bandwidth usage optimizations
* rate limited DHT send socket
* tracker connections are now also subject to IP filtering
* improved optimistic unchoke logic
* added monitoring of the DHT lookups
* added bandwidth reports for estimated TCP/IP overhead and DHT
* includes DHT traffic in the rate limiter
* added support for bitcomet padding files
* improved support for sparse files on windows
* added ability to give seeding torrents preference to active slots
* added torrent_status::finished_time
* automatically caps files and connections by default to rlimit
* added session::is_dht_running() function
* added torrent_handle::force_dht_announce()
* added torrent_info::remap_files()
* support min_interval tracker extension
* added session saving and loading functions
* added support for min-interval in tracker responses
* only keeps one outstanding duplicate request per peer
reduces waste download, specifically when streaming
* added support for storing per-peer rate limits across reconnects
* improved fallocate support
* fixed magnet link issue when using resume data
* support disk I/O priority settings
* added info_hash to torrent_deleted_alert
* improved LSD performance and made the interval configurable
* improved UDP tracker support by caching connect tokens
* fast piece optimization

* fixed udp tracker race condition
* added support for torrents with odd piece sizes
* fixed issue with disk read cache not being cleared when removing torrents
* made the DHT socket bind to the same interface as the session
* fixed issue where an http proxy would not be used on redirects
* Solaris build fixes
* disabled buggy disconnect_peers feature

* disabled feature to drop requests after having been skipped too many times
* fixed range request bug for files larger than 2 GB in web seeds
* don't crash when trying to create torrents with 0 files
* fixed big_number __init__ in python bindings
* fixed optimistic unchoke timer
* fixed bug where torrents with incorrectly formatted web seed URLs would be
connected multiple times
* fixed MinGW support
* fixed DHT bootstrapping issue
* fixed UDP over SOCKS5 issue
* added support for "corrupt" tracker announce
* made end-game mode less aggressive

* ignore unkown metadata messages
* fixed typo that would sometimes prevent queued torrents to be checked
* fixed bug in auto-manager where active_downloads and active_seeds would
sometimes be used incorrectly
* force_recheck() no longer crashes on torrents with no metadata
* fixed broadcast socket regression from 0.14.7
* fixed hang in NATPMP when shut down while waiting for a response
* fixed some more error handling in bdecode

* fixed deadlock in natpmp
* resume data alerts are always posted, regardless of alert mask
* added wait_for_alert to python binding
* improved invalid filename character replacement
* improved forward compatibility in DHT
* added set_piece_hashes that takes a callback to the python binding
* fixed division by zero in get_peer_info()
* fixed bug where pieces may have been requested before the metadata
was received
* fixed incorrect error when deleting files from a torrent where
not all files have been created
* announces torrents immediately to the DHT when it's started
* fixed bug in add_files that would fail to recurse if the path
ended with a /
* fixed bug in error handling when parsing torrent files
* fixed file checking bug when renaming a file before checking the torrent
* fixed race conditon when receiving metadata from swarm
* fixed assert in ut_metadata plugin
* back-ported some fixes for building with no exceptions
* fixed create_torrent when passing in a path ending with /
* fixed move_storage when source doesn't exist
* fixed DHT state save bug for node-id
* fixed typo in python binding session_status struct
* broadcast sockets now join every network interface (used for UPnP and
local peer discovery)