pg_upgrade documentation says it supports upgrades from 8.4 and newer.
But there is code in there that makes a check and differs pre-8.4 from 8.4-or-newer.
ISTM that code could be cleaned out, because it should be dead based on the initial check that we are upgrading from 8.4 or later?
This appears to be:
* The code in the analyze script (see a follow-up email on this), which actually tries to generate a vacuum script if it's a pre-8.4 without visibility map
* The file copy code in relfilenode.c that copies vm and fsm files only from 8.4 and up (which should now be always)
Or am I misreading something?
//Magnus
