ZmnSCPxj jxPCSnmZ 094eac4e95 plugins/libplugin-pay.c: Properly handle exclusions for routehints with two hops or more. ...

Arguably a low-priority bug since no current node ever generates routehints longer
than one hop.

However, it is possible as an edge case, if the destination is directly accessible
*and* supports multiple channels, that we route through the destination, one of the
*other* channels it has not in the routehint, to the entry point, and then through
the routehint.

This change removes the risk of the above edge case.

Changelog-None: arguably a low-priority bug.

2020-08-03 15:20:29 +09:30

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