Freeciv

There's typos that need fixing -
"?good:Requires import of %s ." Extra space char
"?cityprop:Applies only to %s cities" Missing .
"?cityprop:Does not apply to %s cities" Missing .

I don't like a routine >3000 lines long, not good coding style IMO. I want to make it be like -

 switch (preq->source.kind) {
  case VUT_NONE:
    return FALSE;

  case VUT_COUNTER:
    return req_text_counter();

  case VUT_ADVANCE:
    return req_text_advance();

  case VUT_TECHFLAG:
    return req_text_techflag();

...

extracting a bunch of new routines, one for each req type.