Update copyright dates for header generation
diff --git a/api/GL/glcorearb.h b/api/GL/glcorearb.h
index 0f2ebca..ff3e9a8 100755
--- a/api/GL/glcorearb.h
+++ b/api/GL/glcorearb.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
diff --git a/api/GL/glext.h b/api/GL/glext.h
index d061f7c..acf881b 100644
--- a/api/GL/glext.h
+++ b/api/GL/glext.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -51,7 +51,7 @@
 #define GLAPI extern
 #endif
 
-#define GL_GLEXT_VERSION 20180328
+#define GL_GLEXT_VERSION 20180525
 
 /* Generated C header for:
  * API: gl
diff --git a/api/GL/glxext.h b/api/GL/glxext.h
index a85ca22..4c984ef 100755
--- a/api/GL/glxext.h
+++ b/api/GL/glxext.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -34,7 +34,7 @@
 **   https://github.com/KhronosGroup/OpenGL-Registry
 */
 
-#define GLX_GLXEXT_VERSION 20180316
+#define GLX_GLXEXT_VERSION 20180525
 
 /* Generated C header for:
  * API: glx
diff --git a/api/GL/wglext.h b/api/GL/wglext.h
index 027fbac..2d528f7 100755
--- a/api/GL/wglext.h
+++ b/api/GL/wglext.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -39,7 +39,7 @@
 #include <windows.h>
 #endif
 
-#define WGL_WGLEXT_VERSION 20180316
+#define WGL_WGLEXT_VERSION 20180525
 
 /* Generated C header for:
  * API: wgl
diff --git a/api/GLES/gl.h b/api/GLES/gl.h
index 90b89d1..6955f6a 100644
--- a/api/GLES/gl.h
+++ b/api/GLES/gl.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -36,7 +36,7 @@
 
 #include <GLES/glplatform.h>
 
-/* Generated on date 20180328 */
+/* Generated on date 20180525 */
 
 /* Generated C header for:
  * API: gles1
diff --git a/api/GLES/glext.h b/api/GLES/glext.h
index 15bc433..6c9c9d2 100644
--- a/api/GLES/glext.h
+++ b/api/GLES/glext.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -38,7 +38,7 @@
 #define GL_APIENTRYP GL_APIENTRY*
 #endif
 
-/* Generated on date 20180328 */
+/* Generated on date 20180525 */
 
 /* Generated C header for:
  * API: gles1
diff --git a/api/GLES2/gl2.h b/api/GLES2/gl2.h
index 93e94a4..5e8e4c5 100644
--- a/api/GLES2/gl2.h
+++ b/api/GLES2/gl2.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -44,7 +44,7 @@
 #define GL_GLES_PROTOTYPES 1
 #endif
 
-/* Generated on date 20180328 */
+/* Generated on date 20180525 */
 
 /* Generated C header for:
  * API: gles2
diff --git a/api/GLES2/gl2ext.h b/api/GLES2/gl2ext.h
index ba8e478..94d5dba 100644
--- a/api/GLES2/gl2ext.h
+++ b/api/GLES2/gl2ext.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -38,7 +38,7 @@
 #define GL_APIENTRYP GL_APIENTRY*
 #endif
 
-/* Generated on date 20180328 */
+/* Generated on date 20180525 */
 
 /* Generated C header for:
  * API: gles2
diff --git a/api/GLES3/gl3.h b/api/GLES3/gl3.h
index 8c741cc..639df8c 100644
--- a/api/GLES3/gl3.h
+++ b/api/GLES3/gl3.h
@@ -6,7 +6,7 @@
 #endif
 
 /*
-** Copyright (c) 2013-2017 The Khronos Group Inc.
+** Copyright (c) 2013-2018 The Khronos Group Inc.
 **
 ** Permission is hereby granted, free of charge, to any person obtaining a
 ** copy of this software and/or associated documentation files (the
@@ -44,7 +44,7 @@
 #define GL_GLES_PROTOTYPES 1
 #endif
 
-/* Generated on date 20180328 */
+/* Generated on date 20180525 */
 
 /* Generated C header for:
  * API: gles2
diff --git a/xml/Makefile b/xml/Makefile
index f5f8748..35a4bda 100644
--- a/xml/Makefile
+++ b/xml/Makefile
@@ -1,4 +1,4 @@
-# Copyright (c) 2013-2017 The Khronos Group Inc.
+# Copyright (c) 2013-2018 The Khronos Group Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/xml/genglvnd.py b/xml/genglvnd.py
index 09096fd..5b3ab02 100755
--- a/xml/genglvnd.py
+++ b/xml/genglvnd.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright (c) 2013-2017 The Khronos Group Inc.
+# Copyright (c) 2013-2018 The Khronos Group Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -143,7 +143,7 @@
 # Copyright text prefixing all headers (list of strings).
 prefixStrings = [
     '/*',
-    '** Copyright (c) 2013-2017 The Khronos Group Inc.',
+    '** Copyright (c) 2013-2018 The Khronos Group Inc.',
     '**',
     '** Permission is hereby granted, free of charge, to any person obtaining a',
     '** copy of this software and/or associated documentation files (the',
diff --git a/xml/genheaders.py b/xml/genheaders.py
index 06e1992..6cb0634 100755
--- a/xml/genheaders.py
+++ b/xml/genheaders.py
@@ -1,6 +1,6 @@
 #!/usr/bin/env python
 #
-# Copyright (c) 2013-2017 The Khronos Group Inc.
+# Copyright (c) 2013-2018 The Khronos Group Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
@@ -134,7 +134,7 @@
 # Copyright text prefixing all headers (list of strings).
 prefixStrings = [
     '/*',
-    '** Copyright (c) 2013-2017 The Khronos Group Inc.',
+    '** Copyright (c) 2013-2018 The Khronos Group Inc.',
     '**',
     '** Permission is hereby granted, free of charge, to any person obtaining a',
     '** copy of this software and/or associated documentation files (the',
diff --git a/xml/gl.xml b/xml/gl.xml
index 0bd1a31..0a29abc 100644
--- a/xml/gl.xml
+++ b/xml/gl.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <registry>
     <comment>
-Copyright (c) 2013-2017 The Khronos Group Inc.
+Copyright (c) 2013-2018 The Khronos Group Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/xml/glx.xml b/xml/glx.xml
index d6a7c27..f903576 100644
--- a/xml/glx.xml
+++ b/xml/glx.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <registry>
     <comment>
-Copyright (c) 2013-2017 The Khronos Group Inc.
+Copyright (c) 2013-2018 The Khronos Group Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
diff --git a/xml/reg.py b/xml/reg.py
index daed056..9e31e39 100755
--- a/xml/reg.py
+++ b/xml/reg.py
@@ -1,6 +1,6 @@
 #!/usr/bin/python3 -i
 #
-# Copyright (c) 2013-2017 The Khronos Group Inc.
+# Copyright (c) 2013-2018 The Khronos Group Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/xml/registry.rnc b/xml/registry.rnc
index 86e6854..30c55dc 100644
--- a/xml/registry.rnc
+++ b/xml/registry.rnc
@@ -1,4 +1,4 @@
-# Copyright (c) 2013-2017 The Khronos Group Inc.
+# Copyright (c) 2013-2018 The Khronos Group Inc.
 #
 # Licensed under the Apache License, Version 2.0 (the "License");
 # you may not use this file except in compliance with the License.
diff --git a/xml/wgl.xml b/xml/wgl.xml
index 1adc1e3..1d7c604 100644
--- a/xml/wgl.xml
+++ b/xml/wgl.xml
@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <registry>
     <comment>
-Copyright (c) 2013-2017 The Khronos Group Inc.
+Copyright (c) 2013-2018 The Khronos Group Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License");
 you may not use this file except in compliance with the License.
@@ -459,7 +459,7 @@
     <enums namespace="WGL" start="0x31B3" end="0x31B3" vendor="ARB" comment="Shared with GLX.">
         <enum value="0x31B3" name="WGL_CONTEXT_OPENGL_NO_ERROR_ARB"/>
     </enums>
-    
+
     <enums namespace="GL" start="0x8250" end="0x826F" vendor="ARB" comment="Values shared with GL. Do not allocate additional values in this range.">
         <enum value="0x8252"        name="WGL_LOSE_CONTEXT_ON_RESET_ARB"/>
         <enum value="0x8256"        name="WGL_CONTEXT_RESET_NOTIFICATION_STRATEGY_ARB"/>