Allow binary asy to be used on BLFS.

It has been broken since TL2020. Thanks to xry111 for the minimal
workaround.

introduction/welcome/changelog.xml

@@ -38,6 +38,18 @@
       </itemizedlist>
     </listitem>
     -->
+   <listitem>
+     <para>March 28th, 2023</para>
+     <itemizedlist>
+       <listitem>
+         <para>[ken] - The binary version of <command>asy</command>
+         has been compiled against libGLX since 2020 - work around
+         that in case anyone wishes to use it in future. Partly addresses
+         <ulink url="&blfs-ticket-root;17823">#17823</ulink>.</para>
+       </listitem>
+     </itemizedlist>
+   </listitem>
+
    <listitem>
      <para>March 27th, 2023</para>
      <itemizedlist>

pst/typesetting/tl-installer.xml

@@ -134,6 +134,14 @@
       The binary version of <application>asy</application> needs
       <xref linkend="freeglut"/>.
     </para>
+    <para> <!-- needed, but cannot recommend :-) -->
+      The binary version of asy is linked to libGLX.so.0 from
+      <ulink url="https://gitlab.freedesktop.org/glvnd/libglvnd/">libglvnd</ulink>,
+      but installing that will break future updates of BLFS packages such as
+      <xref linkend="mesa"/>. Work around that by creating a symlink as the
+      <systemitem class="username">root</systemitem> user:
+    </para>
+    <screen role="nodump"><userinput>ln -sv libGL.so.1 /usr/lib/libGLX.so.0</userinput></screen>
     <note>
       <para>
         As always with contributed binary software, it is possible that the