WWM_USR
(void) var_setnum("m_usr", WWM_USR);
if (diff & WWM_USR) {
if (new & WWM_USR) {
tt.tt_availmodes |= WWM_USR;
if (new & WWM_USR)
tt.tt_availmodes |= WWM_BLK|WWM_UL|WWM_DIM|WWM_USR;
if (wwavailmodes & WWM_USR)