(Set of Object IDs, modify) The empty object identifier
set. The routine will allocate the gss_OID_set_desc object,
which the application must free after use with a call to
Create an object-identifier set containing no object identifiers,
to which members may be subsequently added using the
gss_add_oid_set_member() routine. These routines are intended to
be used to construct sets of mechanism object identifiers, for
input to gss_acquire_cred.