gossip: use query_channel_range to probe missing channels

[rustyrussell]

Use query_channel_range to probe for missing gossip, when we detect something amiss. This means we no longer rely on the deprecated filter usage described in lightning/bolts#641).

can this (and #2992) be closed cause they were moved from to do to done?

[sangbida]

This issue is being closed as part of issue cleanup.

Reason: Very old issue (6.5 years old) no recent activity

If you believe this issue should remain open, please comment and we can reopen it.