Add minimal compatibility headers for AsyncHTTPSRequest_Generic

This library for asynchronous HTTPS requests was originally written to use
its own fork of AsyncTCP, renamed to AsyncTCP_SSL and patched to add
SSL support. However, this fork has also inherited the design flaw of a queue
post with infinite delay that plagues the original AsyncTCP library. Therefore
these header files were created that simply #define AsyncSSLClient back
into AsyncClient, only when ASYNC_TCP_SSL_ENABLED is defined. Tested
with one of the AsyncHTTPSRequest_Generic examples and confirmed to
run without issue using AsyncTCPSock instead.

Author: avillacis

src/AsyncTCP_SSL.h

@@ -0,0 +1,6 @@
+#ifndef ASYNCTCP_SSL_H_
+#define ASYNCTCP_SSL_H_
+
+#include "AsyncTCP_SSL.hpp"
+
+#endif /* ASYNCTCP_SSL_H_ */

src/AsyncTCP_SSL.hpp

@@ -0,0 +1,17 @@
+#ifndef ASYNCTCP_SSL_HPP
+#define ASYNCTCP_SSL_HPP
+
+#ifdef ASYNC_TCP_SSL_ENABLED
+
+#include <AsyncTCP.h>
+
+#define AsyncSSLClient AsyncClient
+#define AsyncSSLServer AsyncServer
+
+#define ASYNC_TCP_SSL_VERSION             "AsyncTCPSock SSL shim v0.0.1"
+
+#else
+#error Compatibility shim requires ASYNC_TCP_SSL_ENABLED to be defined!
+#endif
+
+#endif