In the current implementation of BoundaryInfo, when the side of an element
is added all the nodes on that side are added with bc_id tags as well.  This
is fine for non-refined meshes, but not with adaptivity.  This is because
children inherit boundary condition information from their parent and are
not explicitly added to the BoundaryInfo class.  So their nodes obviously
don't get added automatically either.

Is anyone counting on the fact that level-0 elements nodes get added
automatically to the boundary information when a side is added?  If not I'd
like to remove that 'misfeature' since it seems like a bug now that we only
store side boundary condition information on level-0 elements.

-Ben


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