chore(Conn): move Validate below ProxyHeaderPolicy

This field order reflect usage pattern and avoids mixing exported and unexported fields.

Author: mmatczuk

protocol.go

@@ -43,10 +43,10 @@ type Conn struct {
 	once              sync.Once
 	readErr           error
 	conn              net.Conn
-	Validate          Validator
 	bufReader         *bufio.Reader
 	header            *Header
 	ProxyHeaderPolicy Policy
+	Validate          Validator
 	readHeaderTimeout time.Duration
 }