fix fs.BoolVar

Signed-off-by: Tim Vaillancourt <tim@timvaillancourt.com>

go/vt/vtgate/vtgate.go

@@ -117,7 +117,7 @@ func registerFlags(fs *pflag.FlagSet) {
 	fs.StringVar(&defaultDDLStrategy, "ddl_strategy", defaultDDLStrategy, "Set default strategy for DDL statements. Override with @@ddl_strategy session variable")
 	fs.StringVar(&dbDDLPlugin, "dbddl_plugin", dbDDLPlugin, "controls how to handle CREATE/DROP DATABASE. use it if you are using your own database provisioning service")
 	fs.BoolVar(&noScatter, "no_scatter", noScatter, "when set to true, the planner will fail instead of producing a plan that includes scatter queries")
-	fs.BoolVar("no_vstream_copy", noVstreamCopy, "when set to true, vstream copy will not be allowed - temporary until we can properly support RDONLY for this")
+	fs.BoolVar(&noVstreamCopy, "no_vstream_copy", noVstreamCopy, "when set to true, vstream copy will not be allowed - temporary until we can properly support RDONLY for this")
 	fs.BoolVar(&enableShardRouting, "enable-partial-keyspace-migration", enableShardRouting, "(Experimental) Follow shard routing rules: enable only while migrating a keyspace shard by shard. See documentation on Partial MoveTables for more. (default false)")
 	fs.DurationVar(&healthCheckRetryDelay, "healthcheck_retry_delay", healthCheckRetryDelay, "health check retry delay")
 	fs.DurationVar(&healthCheckTimeout, "healthcheck_timeout", healthCheckTimeout, "the health check timeout period")