PT-2340 - Support MySQL 8.4

- Changed write-user-docs script, so it creates special documentation pages for symbolic links.

util/write-user-docs

@@ -159,12 +159,29 @@ write_rst() {
       return
    fi
 
+   if [ -h $file ]; then
+      local link="$(readlink $file)"
+      echo "
+.. program:: ${tool}
+
+============================
+:program:\`${tool}\`
+============================
+
+NAME
+====
+
+:program:\`$(basename $file)\` is a symbolic link to ${link}. Please read documentation for ${link}.
+
+" > $RST_DIR/$tool.rst
+   else
       $BRANCH/util/pod2rst-fixed.packed $file > $RST_DIR/$tool.rst
       if [ $? -eq 0 ]; then
          echo "Wrote $RST_DIR/$tool.rst"
       else
          die "Error writing $RST_DIR/$tool.rst"
       fi
+   fi
 }
 
 # Parse the head1 sections from percona-toolkit.pod and write them as