PPTP configuration

here in PPTP configuration documentation

https://openwrt.org/docs/guide-user/services/vpn/pptp/basic


### Firewall configuration

##### Accept traffic from wan
config rule
	option target 'ACCEPT'
	option _name 'pptp'
	option src 'wan'
	option proto 'tcp'
	option dest_port '1723'

config rule
	option target 'ACCEPT'
	option _name 'gre'
	option src 'wan'
	option proto '47'

there is used _name option
but in firewall documentation there is no _name option (there is name)

so this is mistake?? I should use name instead _name??

thanks in advance