bug#9917: bug#5042: bug#9917: 24.0.90; Make `goto-line' consistent with the line number from the minibuffer

[Drew Adams]

In any buffer, including Info, a user can
want to go to a line counted from bob or from
point-min (current narrowing/restriction).

(Stefan mentioned the use case of an Info node
that's further narrowed.  There's also the
case of an Info buffer that a user has widened
intentionally.) 

There's no good way to read a user's mind
about this.

We can have a reasonable _default_ behavior,
and provide the other behavior as an
alternative.

We can do that using a prefix arg (I suggested
a negative one).  Or we can do it by providing
two separate commands.  Or in some other way.

And we could decide to have the default
behavior depend on something (type of buffer
or whatever).  But this might not be the best
approach.  (I think it's probably not.)

In any case, we should give users a way to
choose what they want, whatever the buffer.