slaxMainElement() handle cleanup for K_MAIN; fix slaxHandleEltArg for "main <elt> {";  teach slaxHandleEltArgSafeInsert() not to go after parents; use slaxAddChild()
slaxMainElement() handle cleanup for K_MAIN; fix slaxHandleEltArg for "main <elt> {";  teach slaxHandleEltArgSafeInsert() not to go after parents; use slaxAddChild()

Juniper/libslax,Juniper/libslax,Juniper/libslax