1.0.42.42: hack around *AUTO-EVAL-IN-FRAME* issues

1.0.42.42: hack around *AUTO-EVAL-IN-FRAME* issues

 When frame doesn't have sufficient debug information and
 *AUTO-EVAL-IN-FRAME* is true -- the default -- the debugger REPL
 becomes useless in the frame. Oops.

 So, in those cases punt to regular EVAL instead -- which is the right
 thing most of the time. To avoid confusion by DWIM, tell the user
 when punting to global context.