* `1220465006`: seconds after the epoch that the trustdb will need to be rechecked (usually due to the closest pending expiration, etc)
* `3`: Either 3 certifications from keys with marginal ownertrust are needed for full User ID+Key validity
* `1`: Or 1 certification from a key with full ownertrust is needed for full User ID+Key validity
- * `5`: max_cert_depth (not sure exactly how this is used)
+ * `5`: `max_cert_depth` (not sure exactly how this is used, though the name is certainly suggestive)