LookupFor resolves q over client-code preferred tid conveyed via DNSOpts returned from DNSListener.OnQuery. As a special case, UID may be protect.MyUid or core.UNKNOWN_UID_STR ("-1") but otherwise it is usually a Linux user-id assigned to a process which presumably is requesting this lookup.
(q []byte, uid string)
source not stored for this graph (policy: none)
no outgoing calls
no test coverage detected