A_B_SEARCH
mca = A_B_SEARCH;
case A_B_SEARCH:
case A_B_SEARCH:
case A_B_SEARCH:
case A_B_SEARCH:
'?', 0, A_B_SEARCH,
ESC, '?', 0, A_B_SEARCH|A_EXTRA, '*', 0,
{ "back-search", A_B_SEARCH },