Cleanup #include structure of altcp_tls a bit

(as discussed with Simon today)

src/include/lwip/altcp_tls.h

@@ -43,8 +43,6 @@
 
 #if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
 
-#include "altcp_tls_opts.h"
-
 #if LWIP_ALTCP_TLS
 
 #include "lwip/altcp.h"

src/include/lwip/apps/altcp_tls_mbedtls_opts.h

@@ -2,7 +2,7 @@
  * @file
  * Application layered TCP/TLS connection API (to be used from TCPIP thread)
  *
- * This file contains options for a TLS layer.
+ * This file contains options for an mbedtls port of the TLS layer.
  */
 
 /*
@@ -43,21 +43,16 @@
 
 #if LWIP_ALTCP /* don't build if not configured for use in lwipopts.h */
 
-/** LWIP_ALTCP_TLS==1: enable TLS support for altcp API */
-#ifndef LWIP_ALTCP_TLS
-#define LWIP_ALTCP_TLS          0
-#endif
-
 /** LWIP_ALTCP_TLS_MBEDTLS==1: use mbedTLS for TLS support for altcp API
  * mbedtls include directory must be reachable via include search path
  */
 #ifndef LWIP_ALTCP_TLS_MBEDTLS
-#define LWIP_ALTCP_TLS_MBEDTLS  0
+#define LWIP_ALTCP_TLS_MBEDTLS                        0
 #endif
 
 /** Configure debug level of this file */
 #ifndef ALTCP_MBEDTLS_DEBUG
-#define ALTCP_MBEDTLS_DEBUG     LWIP_DBG_OFF
+#define ALTCP_MBEDTLS_DEBUG                           LWIP_DBG_OFF
 #endif
 
 /** Set a session timeout in seconds for the basic session cache

src/include/lwip/apps/mqtt.h

@@ -40,7 +40,6 @@
 #include "lwip/apps/mqtt_opts.h"
 #include "lwip/err.h"
 #include "lwip/ip_addr.h"
-#include "lwip/apps/altcp_tls.h"
 
 #ifdef __cplusplus
 extern "C" {

src/include/lwip/opt.h

@@ -1355,6 +1355,12 @@
 #ifndef LWIP_ALTCP
 #define LWIP_ALTCP                      0
 #endif
+
+/** LWIP_ALTCP_TLS==1: enable TLS support for altcp API */
+#ifndef LWIP_ALTCP_TLS
+#define LWIP_ALTCP_TLS                  0
+#endif
+
 /**
  * @}
  */