Sign Tribler.app final bundle and Windows .exe

[devos50]

Before releasing Tribler 7, we should check the signing process of the .exe on Windows and the .app on macOS.

[devos50]

The .exe on Windows is now signed (don't mind the version; it's because the tags on my Tribler fork are off):

[qstokkink]

Signing of the Mac .app will be deferred to the 7.1 release.

[devos50]

We successfully signed Tribler.app with my developer credentials, using the codesign tool. Since I do not want to use my own private key to do this, we should check whether the TU Delft has an Apple Developer account, or create one for the Tribler team.

[devos50]

I stil haven't heard anything back from our ICT department. I will move this issue to backlog since I do not expect that we will get a valid signing certificate anytime soon.

[synctext]

just to document our journey somewhat.
From 11 May 2015 until 2018 we used DigiCert. Digicert certificate for Build signing.

We could use the Surfnet facilities, they offer support.
https://dracc.commonsconservancy.org/ The Commons Conservancy is a not-for-profit foundation ('Stichting') established under The Netherlands law. See F-Droid example

Cost	Option
$1400 extortion	DigiCert: https://order.digicert.com/step1/code_signing_ev
$330/Y	Certum: https://shop.certum.eu/data-safety/code-signing-certificates.html
$69	https://shop.certum.eu/open-source-code-signing.html issued by Certum, the certificate root of which is automatically recognized as trusted in all the most popular Internet browsers as well as in all Microsoft products

Assume: Mac users only know how to drag&drop, not magic right click. Add Brew support?
Preference, AppleID organisation account with my name as contact point.

[qstokkink]

Thanks to @xoriole the Apple release is now signed. The only remaining issue is now Windows, for which there is a separate issue here: #5648