downloads with software repo are lacking extension and cannot be extracted

[hohwille]

Starting installation of java to /d/projects/myproject-ide/software/java from http://de-mucevolve02/files/devon-ide/software/java/11.0.4_11/java-11.0.4_11-windows.tgz
Downloading java-11.0.4_11-windows from http://de-mucevolve02/files/devon-ide/software/java/11.0.4_11/java-11.0.4_11-windows.tgz
  % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
                                 Dload  Upload   Total   Spent    Left  Speed
100  185M  100  185M    0     0  3327k      0  0:00:57  0:00:57 --:--:-- 4286k

 

******** ATTENTION ********
ERROR: Unknown archive format: .4_11-windows. Can not extract /c/Users/vapadwal/Downloads/java-11.0.4_11-windows
We are sorry for the inconvenience. Please check the above errors, resolve them and try again.

[hohwille]

Another related bug from #239:

tar: /c/Users/vapadwal/Downloads/java-11.0.4_11-windows.tgz: Cannot open: No such file or directory
you need to change
doExtract "${DEVON_DOWNLOAD_DIR}/${filename}" "${dir}
to
doExtract "${download_dir}/${filename}" "${dir}

This is comming from #231