remove and diminish references to lgt

doc/docbook/articles/main_menu.xml

@@ -3170,11 +3170,6 @@
         <link xlink:href="../../man1/en/ir-X.php">Ir-X</link>
       </para>
     </listitem>
-    <listitem>
-      <para>
-        <link xlink:href="../../man1/en/lgt.php">Lgt</link>
-      </para>
-    </listitem>
     <listitem>
       <para>
         <link xlink:href="../../man1/en/loop.php">Loop</link>

doc/docbook/system/man1/remrt.xml

@@ -465,7 +465,6 @@ host_lookup_by_hostent(localhost) got localhost?
   <citerefentry><refentrytitle>scriptsort</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>brlcad</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>mged</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-  <citerefentry><refentrytitle>lgt</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>pix-fb</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>rtray</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>rtpp</refentrytitle><manvolnum>1</manvolnum></citerefentry>,

doc/docbook/system/man1/rt.xml

@@ -708,7 +708,6 @@
   <refsection xml:id="see_also"><title>SEE ALSO</title>
   <para><citerefentry><refentrytitle>brlcad</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>mged</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
-  <citerefentry><refentrytitle>lgt</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>pix-fb</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>png-fb</refentrytitle><manvolnum>1</manvolnum></citerefentry>,
   <citerefentry><refentrytitle>rtray</refentrytitle><manvolnum>1</manvolnum></citerefentry>,

doc/docbook/system/man1/rtedge.xml

@@ -609,20 +609,21 @@
   <refsection xml:id="additional_options"><title>ADDITIONAL OPTIONS</title>
 
     <para>
-      <command>rtedge</command> replaces <citerefentry><refentrytitle>lgt</refentrytitle><manvolnum>1</manvolnum></citerefentry>.
-      In addition to the simple white edges on a black background (or black on white)
-      provided by <command>lgt</command>, <command>rtedge</command>
-      allows arbitrary color combinations. It also allows rendering into an
-      existing framebuffer and occlusion detection between two pieces of geometry.
-      To configure its behavior, <command>rtedge</command> makes copious use of
-      the <option>-c</option> option.
+      In addition to rendering simple white edges on a black
+      background (or black on white), <command>rtedge</command> allows
+      arbitrary color combinations.  It also allows rendering into an
+      existing framebuffer and occlusion detection between two pieces
+      of geometry.  To configure behavior, <command>rtedge</command>
+      makes copious use of the <option>-c</option> option for
+      configuring settings.  <command>rtedge</command> replaced the
+      now obsolete <command>lgt</command> utility.
     </para>
 
     <para>
       Note that this approach is necessitated by the fact that
       <citerefentry><refentrytitle>librt</refentrytitle><manvolnum>3</manvolnum></citerefentry>
-      has used up nearly the entire
-      alphabet. A transition to GNU-style long option names is planned.
+      has used up nearly the entire alphabet. A transition to
+      GNU-style long option names is planned.
     </para>
     <variablelist remap="TP">
       <varlistentry>

doc/html/manuals/Install.html

@@ -282,7 +282,6 @@ <H1>
 <tr><TH>PROGRAMS</th><th>Description</th></tr>
 <tr></tr>
 <tr><td>rt</td><td>A ray-tracing lighting model, for rendering</td></tr>
-<tr><td>lgt</td><td>Another lighting model, for rendering</td></tr>
 <tr><td>mged</td><td>A solid-model editor</td></tr>
 <tr><td>conv</td><td>ASCII/binary database converters</td></tr>
 <tr><td>fbserv</td><td>Remote network frame-buffer server</td></tr>