Libtorrent

* fix bug where web seeds were not used for torrents added by URL
* fix support for symlinks on windows
* fix long filename issue (on unixes)
* fixed performance bug in DHT torrent eviction
* fixed win64 build (GetFileAttributesEx)
* fixed bug when deleting files for magnet links before they had metadata

* fix bug where loading settings via load_state() would not trigger all
appropriate actions
* fix bug where 32 bit builds could use more disk cache than the virtual
address space (when set to automatic)
* fix support for torrents with > 500'000 pieces
* fix ip filter bug when banning peers
* fix IPv6 IP address resolution in URLs
* introduce run-time check for torrent info-sections being too large
* fix web seed bug when using proxy and proxy-peer-connections=false
* fix bug in magnet link parser
* introduce add_torrent_params flags to merge web seeds with resume data
(similar to trackers)
* fix bug where dont_count_slow_torrents could not be disabled
* fix fallocate hack on linux (fixes corruption on some architectures)
* fix auto-manage bug with announce to tracker/lsd/dht limits
* improve DHT routing table to not create an unbalanced tree
* fix bug in uTP that would cause any connection taking more than one second
to connect be timed out (introduced in the vulnerability path)
* fixed falling back to sending UDP packets direct when socks proxy fails
* fixed total_wanted bug (when setting file priorities in add_torrent_params)
* fix python3 compatibility with sha1_hash

* fixed uTP vulnerability
* make utf8 conversions more lenient
* fix loading of piece priorities from resume data
* improved seed-mode handling (seed-mode will now automatically be left when
performing operations implying it's not a seed)
* fixed issue with file priorities and override resume data
* fix request queue size performance issue
* slightly improve UDP tracker performance
* fix http scrape
* add missing port mapping functions to python binding
* fix bound-checking issue in bdecoder
* expose missing dht_settings fields to python
* add function to query the DHT settings
* fix bug in 'dont_count_slow_torrents' feature, which would start too many
torrents

* improve ip_voter to avoid flapping
* fixed bug when max_peerlist_size was set to 0
* fix issues with missing exported symbols when building dll
* fix division by zero bug in edge case while connecting peers

* fix bug in python binding for file_progress on torrents with no metadata
* fix assert when removing a connected web seed
* fix bug in tracker timeout logic
* switch UPnP post back to HTTP 1.1
* support conditional DHT get
* OpenSSL build fixes
* fix DHT scrape bug

* python binding build fix for boost-1.57.0
* add --enable-export-all option to configure script, to export all symbols
from libtorrent
* fix if_nametoindex build error on windows
* handle overlong utf-8 sequences
* fix link order bug in makefile for python binding
* fix bug in interest calculation, causing premature disconnects
* tweak flag_override_resume_data semantics to make more sense (breaks
backwards compatibility of edge-cases)
* improve DHT bootstrapping and periodic refresh
* improve DHT maintanence performance (by pinging instead of full lookups)
* fix bug in DHT routing table node-id prefix optimization
* fix incorrect behavior of flag_use_resume_save_path
* fix protocol race-condition in super seeding mode
* support read-only DHT nodes
* remove unused partial hash DHT lookups
* remove potentially privacy leaking extension (non-anonymous mode)
* peer-id connection ordering fix in anonymous mode
* mingw fixes