FEATURE: add hkps://keys.openpgp.org to keyserver defaults
Seahorse will be able to handle hkps keyservers with seahorse!125 (merged)
Due the issue described in seahorse#262 (closed) , seahorse is only able to use hkps if there is already a acceptable type defined in the defaults. This MR adds hkps://keys.openpgp.org to the list of default keyservers
keys.openpgp.org is a privacy focused keyserver.
More information about this keyserver: https://keys.openpgp.org/about