We want to add a signed VERSION file to Gpg4win so that:
- There is a VERSION file in the installation folder which identifies the installed version.
- There is a VERSION.sig file so that Kleopatra can always verify the integrity of the VERSION file.
Until Gpg4win 5.0.2, NSIS generated the VERSION file on-the-fly while generating the installer. This approach doesn't work well if we want to sign this VERSION file. I have removed the generation of this VERSION file with rWc54cf32a7beb: nsis: Don't install unsigned VERSION file.
Instead we could use the VERSION file that's created by gpg4win's configure.ac script and that contains the version number and the commit hash. I'm not sure when/how the signature should be added.