Address remaining review comments

- Improve Accept() method documentation with suggested text
- Remove duplicate PP2_TYPE_SSL constant, use inline constant reference
- Simplify hasTLVSSL function

Signed-off-by: speruri <surya.srikar.peruri@zalando.de>

Author: speruri

proxylistener/proxylistener.go

@@ -94,6 +94,9 @@ type tlvExtractorListener struct {
 	wrapped net.Listener
 }
 
+// Accept extracts SSL information from a ProxyHeader if the net.Conn is a proxyproto.Conn
+// and stores it in an internal data structure. You can get the information by using
+// GetProxyProtoSSL.
 func (tl *tlvExtractorListener) Accept() (net.Conn, error) {
 	conn, err := tl.wrapped.Accept()
 	if err != nil {
@@ -161,11 +164,10 @@ func (c *tlvCacheCleanupConn) SetWriteDeadline(t time.Time) error {
 	return c.conn.SetWriteDeadline(t)
 }
 
-// hasTLVSSL checks if the TLV list contains SSL information (type 0x20)
+// hasTLVSSL checks if the TLV list contains SSL information (type 0x20).
 func hasTLVSSL(tlvs []proxyproto.TLV) bool {
-	const PP2_TYPE_SSL = 0x20
 	for _, tlv := range tlvs {
-		if tlv.Type == PP2_TYPE_SSL {
+		if tlv.Type == 0x20 { // PP2_TYPE_SSL
 			return true
 		}
 	}