A library for easy access to GnuPG (GnuPG Made Easy) [https://www.gnupg.org/related_software/gpgme/index.html] (The upstream project and its git repo at <https://dev.gnupg.org/source/gpgme/> are called "gpgme", not "gpgmepp". This external module was renamed from external/gpgme to external/gpgmepp with 50a55d862034b7a06510c014332236f44e306831 "gpg4libre: cleanup gpgme & add gbuild lib for gpgmepp": "This moves the external to gpgmepp, since that's what we _actually_ link against [...]")