Commit0262251

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Pg_upgrade C comment addition.

Document why we do the missing new database check during the checkphase.

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Original file line number	Diff line number	Diff line change
`@@ -372,7 +372,9 @@ check_new_cluster_is_empty(void)`
`372`	`372`	`*the new cluster has a 'postgres' database, the number of databases`
`373`	`373`	`*will not match. We actually could upgrade such a setup, but it would`
`374`	`374`	`*violate the 1-to-1 mapping of database counts, so we throw an error`
`375`		`- *instead.`
	`375`	`+ *instead. We would detect this as a database count mismatch during`
	`376`	`+ *upgrade, but we want to detect it during the check phase and report`
	`377`	`+ *the database name.`
`376`	`378`	`*/`
`377`	`379`	`staticvoid`
`378`	`380`	`check_old_cluster_has_new_cluster_dbs(void)`

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