RB_DUMP
howto |= RB_DUMP;
if ((howto & (RB_DUMP | RB_HALT)) == (RB_DUMP | RB_HALT))
if ((howto & RB_DUMP) != 0) {
if ((howto & (RB_HALT|RB_DUMP)) == RB_DUMP && !cold && !dumping)
if (howto & RB_DUMP) {
bootopt |= RB_DUMP;