indie post discovery

 indie post discovery  is an expansion of original post discovery that focuses on finding the indie post for any particular silo post, regardless of whether the indie post was created originally, or via PESOS, or backfilled import of an export.

Why
This is a useful distinction because:


 * 1) "original post" should still mean something (and we should still keep pushing to POSSE over PESOS as much as possible).
 * 2) "indie post discovery" puts the emphasis on indie, which helps make it clear that indieweb posts are preferred over silos posts in general