T8342: Backport v2020 <- v2021 Backport TLS changes from 2.66

Backport !14 (merged): In order to be able to use glib-networking with OpenSSL as backend we need glib 2.66, which requires additional dependencies. As an alternative backport the TLS support improvements from version 2.66.

Signed-off-by: Walter Lozano walter.lozano@collabora.com