The desktop_entry module implements the XDG Desktop Entry Specification as
described in (https://specifications.freedesktop.org/desktop-entry-spec/latest).
Since other specifications make use of the basic desktop entry format (but with
different group names, entry requirements, etc.), this module implements:

1. The generalized format, and
2. A second processing stage to retrieve values relevant to desktop entries and
   to validate them.

This module will attempt to accept malformed files for the purposes of retaining
their underlying representation, and being able to reproduce that representation
when writing updated information to the files.