A buffer containing an opaque
credential handle identifying the credential to be released. If
GSS_C_NO_CREDENTIAL is supplied, the routine will complete successfully,
but will do nothing.
Description This routine informs GSSAPI that the specified credential
handle is no longer required by the application, and frees associated
resources. When all processes have released a credential, it will
be deleted.
Return
Values This routine returns one of the following GSS status codes: