s/X?GLVendor/x11glvnd/ for consistency

README.md

@@ -52,7 +52,7 @@ There are a few good starting points for familiarizing oneself with the code:
   updated by the API library.
 - Look at `libglxmapping.c:__glXLookupVendorBy{Name,Screen}()` to see how
   vendor library names are queried. At the same time, look at
-  x11glvnd{client,server}.c to see how the "GLVendor" extension which
+  x11glvnd{client,server}.c to see how the "x11glvnd" extension which
   retrieves the appropriate mappings is implemented.
 
 The tests/ directory contains several unit tests which verify that dispatching
@@ -81,7 +81,7 @@ See the diagram below:
           │     └─────┬─────┘             │                    │              │
           │        DT_FILTER              │                    │              │
           │     ┌─────▾──────────┐ ┌──────▾────────┐           │ ┌──────────┐ │
-          │     │                │ │               │           └─│GLVendor  │─┘
+          │     │                │ │               │           └─│x11glvnd  │─┘
           │     │ [mapi/glapi]   ◂─▸               │             │extension │
           │     │ libGLdispatch  │ │   libGLX      ├─────────────▸──────────┘
           │     │                │ │               ◂──────────┬─────────────────┐
@@ -104,7 +104,7 @@ In this diagram,
 libGLX manages loading GLX vendor libraries and dispatching GLX core and
 extension functions to the right vendor.
 
-GLVendor is a simple X extension which allows libGLX to determine the number of
+x11glvnd is a simple X extension which allows libGLX to determine the number of
 the screen belonging to an arbitrary drawable XID, and also the GL vendor to use
 for a given screen.
 

src/x11glvnd/x11glvnd.h

@@ -33,13 +33,13 @@
 #include <X11/Xlib.h>
 
 /*
- * Describes the client-side functions implemented by the XGLVendor extension.
+ * Describes the client-side functions implemented by the x11glvnd extension.
  * This is a simple extension to query the X server for XID -> screen and screen
  * -> vendor mappings, used by libGLX. This may eventually be replaced by a
  *  server-side GLX extension which does the same thing.
  */
 
-#define XGLV_EXTENSION_NAME "XGLVendor"
+#define XGLV_EXTENSION_NAME "x11glvnd"
 
 /*!
  * Returns the screen associated with this XID, or -1 if there was an error.

src/x11glvnd/x11glvndproto.h

@@ -31,7 +31,7 @@
 #define __X11GLVND_PROTO_H__
 
 /*!
- * File describing protocol for the XGLVendor extension.
+ * File describing protocol for the x11glvnd extension.
  */
 
 #include "X11/Xmd.h"