fix problems with ESP8266 core version 2.0.0

src/WebSockets.cpp

@@ -24,8 +24,16 @@
 
 #include "WebSockets.h"
 
+#ifdef ESP8266
+#include <core_esp8266_features.h>
+#endif
+
 extern "C" {
-#include "libb64/cencode.h"
+#ifdef CORE_HAS_LIBB64
+    #include <libb64/cencode.h>
+#else
+    #include "libb64/cencode_inc.h"
+#endif
 }
 
 #ifdef ESP8266

src/libb64/cdecode.c

@@ -5,7 +5,12 @@ This is part of the libb64 project, and has been placed in the public domain.
 For details, see http://sourceforge.net/projects/libb64
 */
 
-#include "cdecode.h"
+#ifdef ESP8266
+#include <core_esp8266_features.h>
+#endif
+
+#ifndef CORE_HAS_LIBB64
+#include "cdecode_inc.h"
 
 int base64_decode_value(char value_in)
 {
@@ -86,3 +91,4 @@ int base64_decode_block(const char* code_in, const int length_in, char* plaintex
 	return plainchar - plaintext_out;
 }
 
+#endif

src/libb64/cencode.c

@@ -5,7 +5,12 @@ This is part of the libb64 project, and has been placed in the public domain.
 For details, see http://sourceforge.net/projects/libb64
 */
 
-#include "cencode.h"
+#ifdef ESP8266
+#include <core_esp8266_features.h>
+#endif
+
+#ifndef CORE_HAS_LIBB64
+#include "cencode_inc.h"
 
 const int CHARS_PER_LINE = 72;
 
@@ -107,3 +112,4 @@ int base64_encode_blockend(char* code_out, base64_encodestate* state_in)
 	return codechar - code_out;
 }
 
+#endif