Get rid of a kludge by Nikodemus and revise a stale comment.
Change x86-64 disassembler not to be so mousy.

I found it's lack of conviction as to whether something was a
static symbol to be disconcerting.
Address style issues in DEF-IR1-TRANSLATOR

- It's not particularly useful from a user perspective to
  see that SETQ's signature is (&WHOLE SOURCE &REST THINGS).
- Don't DEFUN the guard, muck with it, then fmakunbound it.
  Just set the special operators's SYMBOL-FUNCTION in one go.
- Building the cross-compiler warned about unused variables.