http: check x509 common name against the URL

When we connect through a proxy, the certificate common name does not
match the TCP-level hostname...
(cherry picked from commit 02c05f00)

modules/access/http.c

@@ -1106,7 +1106,7 @@ static int Connect( access_t *p_access, int64_t i_tell )
 
         /* TLS/SSL handshake */
         p_sys->p_tls = tls_ClientCreate( VLC_OBJECT(p_access), p_sys->fd,
-                                         srv.psz_host );
+                                         p_sys->url.psz_host );
         if( p_sys->p_tls == NULL )
         {
             msg_Err( p_access, "cannot establish HTTP/TLS session" );