Commit434c6cd

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C comment: explain procArray->pgprocnos[]

Reported-by: Aleksander AlekseevDiscussion:https://postgr.es/m/CAJ7c6TOs9Dh3KNR2kiQJ3Ow0=TBucL_57DAbm--2p8w5x_8YXQ@mail.gmail.comAuthor: Aleksander AlekseevBackpatch-through: master

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Original file line number	Diff line number	Diff line change
`@@ -193,7 +193,11 @@ struct PGPROC`
`193`	`193`
`194`	`194`	`intpgxactoff;/* offset into various ProcGlobal->arrays with`
`195`	`195`	`* data mirrored from this PGPROC */`
`196`		`-intpgprocno;`
	`196`	`+`
	`197`	`+intpgprocno;/* Number of this PGPROC in`
	`198`	`+ * ProcGlobal->allProcs array. This is set`
	`199`	`+ * once by InitProcGlobal().`
	`200`	`+ * ProcGlobal->allProcs[n].pgprocno == n */`
`197`	`201`
`198`	`202`	`/* These fields are zero while a backend is still starting up: */`
`199`	`203`	`BackendIdbackendId;/* This backend's backend ID (if assigned) */`

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