Replace some .Xr with .Ic (programs non-existing or not in base system).

usr.sbin/lpr/lpr/lpr.1

@@ -1,4 +1,4 @@
-.\"	$NetBSD: lpr.1,v 1.8 1999/03/22 18:43:59 garbled Exp $
+.\"	$NetBSD: lpr.1,v 1.9 2001/05/08 17:20:02 wiz Exp $
 .\"
 .\" Copyright (c) 1980, 1990, 1993
 .\"	The Regents of the University of California.  All rights reserved.
@@ -81,7 +81,7 @@ use the appropriate filters to print the data accordingly.
 .Bl -tag -width indent
 .It Fl c
 The files are assumed to contain data produced by
-.Xr cifplot 1
+.Ic cifplot
 .It Fl d
 The files are assumed to contain data from
 .Em tex
@@ -94,9 +94,9 @@ standard
 carriage control character.
 .It Fl g
 The files are assumed to contain standard plot data as produced by the
-.Xr plot 1
+.Ic plot
 routines (see also
-.Xr plot 1
+.Ic plot
 for the filters used by the printer spooler).
 .It Fl l
 Use a filter which allows control characters to be printed and suppresses
@@ -109,7 +109,7 @@ The files are assumed to contain data from
 Use
 .Xr pr 1
 to format the files (equivalent to
-.Xr print 1 ) .
+.Ic print ) .
 .It Fl t
 The files are assumed to contain data from
 .Xr troff 1
@@ -268,6 +268,6 @@ regarding missing spool files by
 Fonts for
 .Xr troff 1
 and
-.Xr tex 1
+.Ic tex
 reside on the host with the printer. It is currently not possible to
 use local font libraries.