Export TLS & remove conn in request struct

This makes it possible to fully create another request outside of this module
(which Hnakra will need) and has better parity with net/http.

request.go

@@ -4,7 +4,6 @@ import (
 	"bufio"
 	"crypto/tls"
 	"io"
-	"net"
 	"net/url"
 )
 
@@ -28,8 +27,7 @@ type Request struct {
 	// This field is ignored by the Gemini server.
 	Certificate *tls.Certificate
 
-	conn net.Conn
-	tls  *tls.ConnectionState
+	TLS *tls.ConnectionState
 }
 
 // NewRequest returns a new request.
@@ -98,30 +96,11 @@ func (r *Request) WriteTo(w io.Writer) (int64, error) {
 	return wrote, bw.Flush()
 }
 
-// Conn returns the network connection on which the request was received.
-// Conn returns nil for client requests.
-func (r *Request) Conn() net.Conn {
-	return r.conn
-}
-
-// TLS returns information about the TLS connection on which the
-// request was received.
-// TLS returns nil for client requests.
-func (r *Request) TLS() *tls.ConnectionState {
-	if r.tls == nil {
-		if tlsConn, ok := r.conn.(*tls.Conn); ok {
-			state := tlsConn.ConnectionState()
-			r.tls = &state
-		}
-	}
-	return r.tls
-}
-
 // ServerName returns the value of the TLS Server Name Indication extension
 // sent by the client.
 // ServerName returns an empty string for client requests.
 func (r *Request) ServerName() string {
-	if tls := r.TLS(); tls != nil {
+	if tls := r.TLS; tls != nil {
 		return tls.ServerName
 	}
 	return ""