/usr/share/glib-2.0/schemas/10_gnome-keyring.gschema.override is in gnome-keyring 3.2.2-2ubuntu4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 | [org.gnome.crypto.pgp]
keyservers=['hkp://keyserver.ubuntu.com:11371', 'hkp://pool.sks-keyservers.net', 'ldap://keyserver.pgp.com']
|