sync code with last improvements from OpenBSD

lib/libXi/man/XGetExtensionVersion.txt

@@ -0,0 +1,51 @@
+XGETEXTENSIONVERSION(libmansuffix)
+==================================
+
+NAME
+----
+
+   XGetExtensionVersion - query the version of the input extension.
+
+SYNOPSIS
+--------
+
+   #include <X11/extensions/XInput.h>
+
+   XExtensionVersion *XGetExtensionVersion( Display *display,
+                                            char *name);
+
+   display
+          Specifies the connection to the X server.
+
+   name
+          Specifies the extension to be queried. The input
+          extension name is defined in the header file XI.h.
+
+DESCRIPTION
+-----------
+
+   The XGetExtensionVersion request is deprecated and should not
+   be used in XI2 applications. Clients issuing a XGetExtensionVersion
+   request will not be able to use XI2 features.
+
+   The XGetExtensionVersion request queries the version of the input
+   extension, and returns an XExtensionVersion structure. This structure
+   contains a major_version and minor_version number which can be compared
+   with constants defined in XI.h. Support for additional protocol
+   requests added to the input extension after its initial release
+   is indicated by a version number corresponding to the added
+   requests. Each version contains all the protocol requests
+   contained by previous versions.
+
+   You should use XFree to free the XExtensionVersion structure.
+
+STRUCTURES
+----------
+
+   This request returns an XExtensionVersion structure.
+
+                typedef struct {
+                    int present;
+                    short major_version;
+                    short minor_version;
+                } XExtensionVersion;