g10: Change tofu_register & tofu_get_validity to process multiple uids.
* g10/tofu.c (tofu_register): Take a list of user ids, not a single user id. Only register the bindings, don't compute the trust. Thus, change return type to an int and remove the may_ask parameter. Update callers. (tofu_get_validity): Take a list of user ids, not a single user id. Update callers. Observe signatures made by expired user ids, but don't include them in the trust calculation.
- Signed-off-by: Neal H. Walfield <neal@g10code.com>