Sort rather than filter Nodes when bearing or radius is provided

[mcwhittemore]

It appears that OSRM filters out nodes that don't match provided radius or bearing options. Would it be possible to convert that filter into a sort so that when no nodes match the bearing and radius filters a route can still be found?

Reading through the code I think this happens here.

[danpat]

Some previous discussion on this: #605 (comment)

[danpat]

To maintain backward compatibilty, I'm going to propose a new API parameter: bearing_mode=strict/soft. By default, current behaviour would be maintained. If bearing_mode=soft is supplied, we'd switch to an alternative weighting, perhaps a biasing instead of a strict filter, as suggested in #605.

[github-actions]

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