control-4.2.1

Most important changes:

• Fix of a bug bug in the computation of the frequency response. The results of bode, nyquist etc. are wrong in case of poles and/or zeros at zero. This bug was introduced in release 4.2.0 of the control package.
• Fix installing the package on Windows where the installation path of Octave contains spaces and the use of short file names is disabled (see discussion on Octave discourse).

Please note: The source archives Source code (zip) and Source code (tar.gz) are automatically added to the release's assets by Github and do not contain the complete sources since this project uses submodules for the SLICOT library. All sources that are required for installing the control package in GNU Octave are included in the downloadable archive file control-x.y.z.tar.gz. The complete sources (including, e.g., the ones for packaging) are available in the repository which has to be cloned using the option --recurse-submodules.