## Description
  - Features:
    - Improved deobfuscation [#469](#469)
      - enhanced parsing of the subject field in NZB files and improved validation of downloaded article filenames 
      - added a check for filename obfuscation after unpacking; excessively obfuscated filenames are renamed to the NZB filename 
      - added new options:
        - `RenameAfterUnpack` - enables/disables renaming of extracted and obfuscated files using the NZB filename
        - `RenameIgnoreExt` - a comma-separated list of file extensions to ignore when renaming files after unpacking
      - added a new value for the `Status` field in the `listgroups` API method: `POST_UNPACK_RENAMING`
    - Network speed tests
      - the new API-method:
        - `struct testnetworkspeed()` - returns the measured network speed in `Mbps` [#489](#489)
    - Added support by `DirectRename` and `ParRename` of nested file paths found in par files [#497](#497)
    - Added a filter to the nzb manual upload dialog [#505](#505)
  - Bug fixes:
    - Fixed: `HealthCheck=None` with `ParCheck=Force` can cause a segmentation fault on unhealthy downloads [#475](#475)
    - Fixed: Attempting to load the certificate even if CertCheck is turned off [#479](#479)
    - Fixed: Loading icon display for NZB uploads in light and dark modes [#486](#486)
    - Fixed PowerPC (ppc500) support [#491](#491)

- added network speed tests
- added the new `testnetworkspeed` API method:
    #### Return value
    - **SpeedMbps** `(double)` - The measured network speed in Mbps.