Re: Missing warning on revokes with grant options

Sorry for the multiple consecutive emails. I just came across this
comment that explains the current behavior in restrict_and_check_grant

/*
* Restrict the operation to what we can actually grant or revoke, and
* issue a warning if appropriate. (For REVOKE this isn't quite what the
* spec says to do: the spec seems to want a warning only if no privilege
* bits actually change in the ACL. In practice that behavior seems much
* too noisy, as well as inconsistent with the GRANT case.)
*/

However, I still think the current behavior is a bit strange since
holding a grant option is not directly required to issue a revoke.
Perhaps for revoke the logic should be:
- for each specified privilege:
- if the set of acl items on the specified object that includes
this privilege is non empty
- and none of those acl items have the current role as the
grantor
- then issue a warning.

Thanks,
Joe Koshakow