K 10 svn:author V 7 rwatson K 8 svn:date V 27 2002-07-23T13:09:24.000000Z K 7 svn:log V 383 Update ucred.9 to talk a bit more about correct use of credentials, including documenting that ucreds must not be pulled out of thin air, when to use td_cred vs. p_ucred, how to avoid race conditions in credential updates, and why to use p_ucred when targetting a thread or process in an access control operation involving two processes. Reviewed by: julian, jhb (earlier revision) END