Commit71dca6e

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Fix connection leak in dblink when dblink_connect() or dblink_connect_u()

end with "duplicate connection name" errors.Backported to release 7.4.

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Original file line number	Diff line number	Diff line change
`@@ -1980,9 +1980,14 @@ createNewConnection(const char name, remoteConn con)`
`1980`	`1980`	`errmsg("out of memory")));`
`1981`	`1981`
`1982`	`1982`	`if (found)`
	`1983`	`+{`
	`1984`	`+PQfinish(rconn->conn);`
	`1985`	`+pfree(rconn);`
	`1986`	`+`
`1983`	`1987`	`ereport(ERROR,`
`1984`	`1988`	`(errcode(ERRCODE_DUPLICATE_OBJECT),`
`1985`	`1989`	`errmsg("duplicate connection name")));`
	`1990`	`+}`
`1986`	`1991`
`1987`	`1992`	`hentry->rcon=con;`
`1988`	`1993`	`strncpy(hentry->name,name,NAMEDATALEN-1);`

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