In particular, this gets some MacOS fixes from #1327.
It also includes a major intmap update which fixes corner cases in traversals,
and requires ccan/bitops.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
This gives us a slew of -Wextra fixes (not all of them though!) but
we're actually doing it for the monotonic version of timers.
This breaks some stuff, so we fix that up next.
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
