sync code with last improvements from OpenBSD

lib/libXv/man/XvQueryExtension.man

@@ -0,0 +1,48 @@
+.TH XvQueryExtension __libmansuffix__ __vendorversion__ "libXv Functions"
+.SH NAME
+XvQueryExtension \- return version and release of extension
+.\"
+.SH SYNOPSIS
+.B #include <X11/extensions/Xvlib.h>
+.sp
+.nf
+.BI "int XvQueryExtension(Display *" dpy ", unsigned int *" p_version ","
+.BI "                    unsigned int *" p_revision ","
+.BI "                    unsigned int *" p_request_base ","
+.BI "                    unsigned int *" p_event_base ","
+.BI "                    unsigned int *" p_error_base ");"
+.fi
+.SH ARGUMENTS
+.\"
+.IP \fIdpy\fR 15
+Specifies the connection to the X server.
+.IP \fIp_version\fR 15
+Pointer to where the current version number of the \fIXv\fP video extension
+is written.
+.IP \fIp_revision\fR 15
+Pointer to where the revision number of the \fIXv\fP video extension
+is written.
+.IP \fIp_request_base\fR 15
+Pointer to where the extension major request number is returned
+.IP \fIp_event_base\fR 15
+Pointer to where the extension event base is returned
+.IP \fIp_error_base\fR 15
+Pointer to where the extension error base is returned
+.\"
+.SH DESCRIPTION
+.\"
+.PP
+.BR XvQueryExtension (__libmansuffix__)
+returns the version and release numbers for the Xv video extension
+currently loaded on the system.  The extension major request number,
+event base, and error base are also returned.
+.\"
+.SH RETURN VALUES
+.IP [Success] 8
+Returned if
+.BR XvQueryExtension (__libmansuffix__)
+completed successfully.
+.IP [XvBadExtension] 8
+Returned if the Xv video extension is not available for the named display.
+.SH SEE ALSO
+.BR Xv (__libmansuffix__)