BitTorrent v2 support enhancements 🥳 (#876)

* BitTorrent v2 support enchancements

* Added torrent name sanitizing

* Using faster language construct instead of function call for name sanitizing

* Minor improvements

- Fixed deformed avatars => get_avatar() function
- Removed outdated dc links support

* Code comments

* Changed function name

* Added table generation function with file list

For search engines to index

* Used humn_size function for size formatting in table generation

* Fixed typo

* Removed useless language variables

* Fixed code formatting

* Fixed broken displaying magnet link

* Torrent fields sanitization in table

* Fixed info hash issue

* Support for v2 only torrents

* Code re-formatting

* Typo

* Update Torrent.php

* Update functions.php

* Updated

* Updated

* Update Torrent.php

* Update TorrentFileList.php

* Update Torrent.php

* Update Torrent.php

* Update Torrent.php

* Update Torrent.php

* Error msg

* Update Torrent.php

* Update Torrent.php

* Updated

* Update Torrent.php

* Update Torrent.php

* Update config.php

* Update mysql.sql

* Update mysql.sql

* Update mysql.sql

* Update mysql.sql

* Update mysql.sql

* String fixes

* Update TorrentFileList.php

---------

Co-authored-by: Roman Kelesidis <roman25052006.kelesh@gmail.com>

install/sql/mysql.sql

@@ -291,7 +291,7 @@ CREATE TABLE IF NOT EXISTS `bb_bt_torrents`
   `tor_type`         TINYINT(1)            NOT NULL DEFAULT '0',
   `speed_up`         INT(11)               NOT NULL DEFAULT '0',
   `speed_down`       INT(11)               NOT NULL DEFAULT '0',
-  PRIMARY KEY (`info_hash`),
+  PRIMARY KEY (`topic_id`),
   UNIQUE KEY `post_id` (`post_id`),
   UNIQUE KEY `topic_id` (`topic_id`),
   UNIQUE KEY `attach_id` (`attach_id`),