PR 8507 is about this command:

 (gdb) help show remote hardware-watchpoint-limit
 Show the maximum number of target hardware watchpoints.
 Specify a negative limit for unlimited.

And the fact that a negative value (default is -1), shows
through as a large positive value, which is somewhat confusing:

 (gdb) show remote hardware-watchpoint-limit 
 The maximum number of target hardware watchpoints is 4294967295.

Notice that the "show" help explicitly mentioned "Specify a negative
limit for unlimited.".

This patch fixes it to show:

 (gdb) set remote hardware-watchpoint-limit -1
 (gdb) show remote hardware-watchpoint-limit
 The maximum number of target hardware watchpoints is unlimited.

There's no current enum var_types for this integer usage, where
0 really means zero, and negatives mean unlimited, so I've added one.

"set/show remote hardware-breakpoint-limit" has the same issue, so it
gets the same fix.

Comments?

-- 
Pedro Alves