[request] encrypted backup

[rb0022]

As per @Box333, encrypted backup compatibility. Cited the following:

• https://github.com/jsharkey13/iphone_backup_decrypt

Which itself cites:

This library aims to be minimal, providing only what is necessary to extract encrypted files. There are alternatives which claim to offer similar or more advanced functionality:

• KnugiHK/iphone_backup_decrypt, a fork of this library and part of Whatsapp-Chat-Exporter.
• jfarley248/iTunes_Backup_Reader, which uses an older version of this library.
• datatags/mount-ios-backup, which uses an older version of this library.
• PeterUpfold/dump-iphone-backup, a wrapper for this library to decrypt a whole backup on the command-line.
• avibrazil/iOSbackup a similar Python library with a friendlier interface for exploring a backup.
• MaxiHuHe04/iTunes-Backup-Explorer, a Java based alternative with a GUI.