Libtorrent

* fix issue with moving the session object
* deprecate torrent_status::allocating. This state is no longer used
* fix bug creating torrents with symbolic links
* remove special case to save metadata in resume data unconditionally when added through magnet link
* fix bugs in mutable-torrent support (reusing identical files from different torrents)
* fix incorrectly inlined move-assignment of file_storage
* add session::paused flag, and the ability to construct a session in paused mode
* fix session-pause causing tracker announces to fail
* fix peer-exchange flags bug
* allow saving resume data before metadata has been downloaded (for magnet links)
* record blocks in the disk queue as downloaded in the resume data
* fix bug in set_piece_deadline() when set in a zero-priority piece
* fix issue in URL parser, causing issues with certain tracker URLs
* use a different error code than host-unreachable, when skipping tracker announces

* New TorrentHandle.inSession() [blocking method, do not use in main UI threads]
* New ability for SessionManager to build a paused session
* New SessionManager.start(SessionParams, session_flags_t)
* New SessionHandle.PAUSED (session_flag_t) and corresponding unit tests
* Removed TorrentStatus::State::ALLOCATING enum
* Removed torrent_status.state_t.unused_enum_for_backwards_compatibility_allocating
* libtorrent 1.2.11.0 update (471e772cb7038f1bf5f44c32a09eb42fbb80ee99)
* lt: upgraded to openssl 1.1.1j
* lt: fix issue with moving the session object
* lt: deprecate torrent_status::allocating. This state is no longer used
* lt: fix bug creating torrents with symbolic links
* lt: remove special case to save metadata in resume data unconditionally when added throught magnet link
* lt: fix bugs in mutable-torrent support (reusing identical files from different torrents)
* lt: fix incorrectly inlined move-assignment of file_storage
* lt: add session::paused flag, and the ability to construct a session in paused mode
* lt: fix session-pause causing tracker announces to fail
* lt: fix peer-exchange flags bug
* lt: allow saving resume data before metadata has been downloaded (for magnet links)
* lt: record blocks in the disk queue as downloaded in the resume data
* lt: fix bug in set_piece_deadline() when set in a zero-priority piece
* lt: fix issue in URL parser, causing issues with certain tracker URLs
* lt: use a different error code than host-unreachable, when skipping tracker announces

* fix regression in python binding for move_storage()
* improve stat_file() performance on Windows
* fix issue with loading invalid torrents with only 0-sized files
* fix to avoid large stack allocations

* libtorrent 1.2.10 update (70f1de3f7ec4012aaea420ff150ef0135d397706)
* lt: improve stat_file() performance on Windows
* lt: fix issue with loading invalid torrents with only 0-sized files
* lt: fix to avoid large stack allocations
* lt: add macro TORRENT_CXX11_ABI for clients building with C++14 against
libtorrent build with C++11
* lt: removed deprecated wstring overloads on non-windows systems
* lt: drop dependency on Unicode's ConvertUTF code (which had a license
incompatible with Debian)
* lt: fix bugs exposed on big-endian systems
* lt: fix detection of hard-links not being supported by filesystem
* lt: fixed resume data regression for seeds with prio 0 files
* binaries: compiler upgraded from g++-5 to g++-7

* add macro TORRENT_CXX11_ABI for clients building with C++14 against
libtorrent build with C++11
* refreshed m4 scripts for autotools
* removed deprecated wstring overloads on non-windows systems
* drop dependency on Unicode's ConvertUTF code (which had a license
incompatible with Debian)
* fix bugs exposed on big-endian systems
* fix detection of hard-links not being supported by filesystem
* fixed resume data regression for seeds with prio 0 files

* validate UTF-8 encoding of client version strings from peers
* don't time out tracker announces as eagerly while resolving hostnames
* fix NAT-PMP shutdown issue
* improve hostname lookup by merging identical lookups
* fix network route enumeration for large routing tables
* fixed issue where pop_alerts() could return old, invalid alerts
* fix issue when receiving have-all message before the metadata
* don't leave lingering part files handles open
* disallow calling add_piece() during checking
* fix incorrect filename truncation at multi-byte character
* always announce listen port 1 when using a proxy