Add postmaster/postgres undocumented -b option for binary upgrades.

This option turns off autovacuum, prevents non-super-user connections,
and enables oid setting hooks in the backend.  The code continues to use
the old autoavacuum disable settings for servers with earlier catalog
versions.

This includes a catalog version bump to identify servers that support
the -b option.

src/backend/utils/init/postinit.c

@@ -625,6 +625,16 @@ InitPostgres(const char *in_dbname, Oid dboid, const char *username,
 			errmsg("must be superuser to connect during database shutdown")));
 	}
 
+	/*
+	 * Binary upgrades only allowed super-user connections
+	 */
+	if (IsBinaryUpgrade && !am_superuser)
+	{
+			ereport(FATAL,
+					(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+			errmsg("must be superuser to connect in binary upgrade mode")));
+	}
+
 	/*
 	 * The last few connections slots are reserved for superusers. Although
 	 * replication connections currently require superuser privileges, we