cookie.go
func (c *Cookie) SetValue(value string) {
	c.value = append(c.value[:0], value...)
}
func (c *Cookie) SetValue(value string) {
	c.value = append(c.value[:0], value...)
}
func ( c * Cookie ) SetValue ( value string ) { c . value = append ( c . value [ : 0 ] , value ... ) }
// SetValue sets cookie value.
SetValue sets cookie value .