start to enable tlstest for portable

Disabled on Windows for now due to pipe2/socketpair support.

tests/tlstest.sh

@@ -0,0 +1,13 @@
+#!/bin/sh
+set -e
+
+tlstest_bin=./tlstest
+if [ -e ./tlstest.exe ]; then
+	tlstest_bin=./tlstest.exe
+fi
+
+if [ -z $srcdir ]; then
+	srcdir=.
+fi
+
+$tlstest_bin $srcdir/server.pem $srcdir/server.pem $srcdir/ca.pem