Remove the tls source from the build again. We want this to be an optional

dependency and that doesn't work yet. Memory like a sieve.

src/tls_dummy.c

@@ -0,0 +1,75 @@
+/* tls.c
+** libstrophe XMPP client library -- TLS abstraction dummy impl.
+**
+** Copyright (C) 2005 OGG, LCC. All rights reserved.
+**
+**  This software is provided AS-IS with no warranty, either express
+**  or implied.
+**
+**  This software is distributed under license and may not be copied,
+**  modified or distributed except as expressly authorized under the
+**  terms of the license contained in the file LICENSE.txt in this
+**  distribution.
+*/
+
+#include "common.h"
+#include "tls.h"
+#include "sock.h"
+
+struct _tls {
+    xmpp_ctx_t *ctx; /* do we need this? */
+    sock_t sock;
+    /* we don't implement anything */
+};
+
+void tls_initialize(void)
+{
+    return;
+}
+
+void tls_shutdown(void)
+{
+    return;
+}
+
+tls_t *tls_new(xmpp_ctx_t *ctx, sock_t sock)
+{
+    /* always fail */
+    return NULL;
+}
+
+void tls_free(tls_t *tls)
+{
+    return
+}
+
+int tls_set_credentials(tls_t *tls, const char *cafilename)
+{
+    return -1;
+}
+
+int tls_start(tls_t *tls)
+{
+    return -1;
+}
+
+int tls_stop(tls_t *tls)
+{
+    return -1;
+}
+
+int tls_error(tls_t *tls)
+{
+    /* todo: some kind of error polling/dump */
+    return 0;
+}
+
+int tls_read(tls_t *tls, void * const buff, const size_t len)
+{
+    return -1;
+}
+
+int tls_write(tls_t *tls, const void * const buff, const size_t len)
+{
+    return -1;
+}