Thank you, Neil and Daniel! There was no particular reason besides lack of ambition that reindexdb and clusterdb were not included. I've added them.
Agreed with Daniel that a switch to control the new behavior makes sense (I hadn't through about the status code issue). Revised patch attached (I've kept the patch name and Subject: consistent for indexing purposes). It applies cleanly to 9fa2c1ebd17.
v2-0001-vacuumdb-skip-unconnectable-databases,patch
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