bug#30675: Ask the user what to do when shr-make-table: Variable binding depth exceeds max-specpdl-size

[積丹尼 Dan Jacobson]

Instead of warning the user when this happens

KY> (defun shr-descend (dom)
KY>   ...
KY>     (if (> shr-depth (/ max-specpdl-size 15))
KY>     (setq shr-warning "Too deeply nested to render properly; consider 
increasing `max-specpdl-size'")
KY>       else ...))

it should ask the user "Should we try 15 levels deeper? y-n

and if that is still not enough,

it should ask the user "Should we try 25 levels even more deeper? y-n
...

Why?

Because the user is facing a probably one-time bad html message.

He doesn't want to change his .emacs to always let them pass.

He also wants the choice:
no I don't want to go deeper for this promotional coupon.
yes my grandmom sent me this so I want to see it.