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- Removed outdated dc links support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>

library/attach_mod/displaying_torrent.php

@@ -211,7 +211,7 @@ if ($tor_reged && $tor_info) {
             'DL_TITLE_CLASS' => (isset($bt_userdata['user_status'])) ? $dl_status_css[$bt_userdata['user_status']] : 'gen',
             'FILESIZE' => $tor_file_size,
             'MAGNET' => $tor_magnet,
-            'HASH' => strtoupper(bin2hex($tor_info['info_hash'])),
+            'HASH' => !empty($tor_info['info_hash']) ? strtoupper(bin2hex($tor_info['info_hash'])) : false,
             'HASH_V2' => !empty($tor_info['info_hash_v2']) ? strtoupper(bin2hex($tor_info['info_hash_v2'])) : false,
             'DOWNLOAD_COUNT' => declension((int)$download_count, 'times'),
             'REGED_TIME' => bb_date($tor_info['reg_time']),