Fix loading very large torrents. Closes #8449.

`torrent_info` constructor has default limits that can't be changed via
parameters, so we handle the loading process manually and explicitly
specifiy the limits to `bdecode()`.
The token_limit is also changed to 10000000.

src/base/bittorrent/torrentinfo.h

@@ -29,6 +29,7 @@
 #ifndef BITTORRENT_TORRENTINFO_H
 #define BITTORRENT_TORRENTINFO_H
 
+#include <QCoreApplication>
 #include <QtGlobal>
 
 #include <libtorrent/torrent_info.hpp>
@@ -51,6 +52,8 @@ namespace BitTorrent
 
     class TorrentInfo
     {
+        Q_DECLARE_TR_FUNCTIONS("TorrentInfo")
+
     public:
 #if LIBTORRENT_VERSION_NUM < 10100
         typedef boost::intrusive_ptr<const libtorrent::torrent_info> NativeConstPtr;