sync code with last improvements from OpenBSD

doc/gl-docs/GL/gl/calllist.3gl

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+'\"macro stdmacro
+.ds Vn Version 1.2
+.ds Dt 24 September 1999
+.ds Re Release 1.2.1
+.ds Dp Jan 14 18:30
+.ds Dm 01 calllist.
+.ds Xs 42225 4 calllist.gl
+.TH GLCALLLIST 3G
+.SH NAME
+.B "glCallList
+\- execute a display list
+
+.SH C SPECIFICATION
+void \f3glCallList\fP(
+GLuint \fIlist\fP )
+.nf
+.fi
+
+.SH PARAMETERS
+.TP \w'\f2list\fP\ \ 'u 
+\f2list\fP
+Specifies the integer name of the display list to be executed.
+.SH DESCRIPTION
+\%\f3glCallList\fP causes the named display list to be executed.
+The commands saved in the display list are executed in order,
+just as if they were called without using a display list.
+If \f2list\fP has not been defined as a display list,
+\%\f3glCallList\fP is ignored.
+.P
+\%\f3glCallList\fP can appear inside a display list.
+To avoid the possibility of infinite recursion resulting from display lists
+calling one another,
+a limit is placed on the nesting level of display
+lists during display-list execution.
+This limit is at least 64, and it depends on the implementation.
+.P
+GL state is not saved and restored across a call to \%\f3glCallList\fP.
+Thus,
+changes made to GL state during the execution of a display list
+remain after execution of the display list is completed.
+Use \%\f3glPushAttrib\fP,
+\%\f3glPopAttrib\fP,
+\%\f3glPushMatrix\fP,
+and \%\f3glPopMatrix\fP to preserve GL state across \%\f3glCallList\fP calls.
+.SH NOTES
+Display lists can be executed between a call to \%\f3glBegin\fP
+and the corresponding call to \%\f3glEnd\fP,
+as long as the display list includes only commands that are allowed
+in this interval.
+.SH ASSOCIATED GETS
+\%\f3glGet\fP with argument \%\f3GL_MAX_LIST_NESTING\fP
+.br
+\%\f3glIsList\fP
+.SH SEE ALSO
+\%\f3glCallLists(3G)\fP,
+\%\f3glDeleteLists(3G)\fP,
+\%\f3glGenLists(3G)\fP,
+\%\f3glNewList(3G)\fP,
+\%\f3glPushAttrib(3G)\fP, 
+\%\f3glPushMatrix(3G)\fP