[proposal] "or if" - run this next block if the previous one ran *or if* the condition is true

["Soni \"They/Them\" L." <fakedme@...>]

I'd like to have the ability to convert, say:

switch (op) {
case OP_TAILCALL: {
  ...
  /*fallthrough*/
}
case OP_CALL: {
  ...
  break;
}
}

into:

if op == OP_TAILCALL then
  ...
  -- fallthrough
orif op == OP_CALL then
  ...
end

because it looks nicer this way I guess.