Replace <term><command><arg> with <term><property><parameter> to describe

options in the config file because:
 * <arg> can only be used within <cmdsynopsis>.
 * <cmdsynopsis> does not allow text outside <command> and <arg>.
 * <arg> does not allow decorating elements like <literal> or <emphasis>.
This fixes #2803057.

Add shortcut entities for commonly used parameters (yes/no, size).
Remove Debian patch which is obsoleted by above changes.

docs/lcdproc-user/drivers/lb216.docbook

@@ -35,8 +35,8 @@ made in australia :-)
 <variablelist>
 <varlistentry>
   <term>
-    <command>Device</command> =
-    <arg choice="plain"><replaceable>DEVICE</replaceable></arg>
+    <property>Device</property> =
+    <parameter><replaceable>DEVICE</replaceable></parameter>
   </term>
   <listitem><para>
     Select the output device to use [default: <filename>/dev/lcd</filename>]
@@ -45,8 +45,8 @@ made in australia :-)
 
 <varlistentry>
   <term>
-    <command>Brightness</command> =
-    <arg choice="plain"><replaceable>BRIGHTNESS</replaceable></arg>
+    <property>Brightness</property> =
+    <parameter><replaceable>BRIGHTNESS</replaceable></parameter>
   </term>
   <listitem><para>
     Set the initial brightness [default: <literal>255</literal>; legal: <literal>0</literal> - <literal>255</literal>]
@@ -55,13 +55,11 @@ made in australia :-)
 
 <varlistentry>
   <term>
-    <command>Speed</command> =
-    <arg choice="plain">
-    <group choice="req">
-      <arg choice="plain"><literal>2400</literal></arg>
-      <arg choice="plain"><literal><emphasis>9600</emphasis></literal></arg>
-    </group>
-    </arg>
+    <property>Speed</property> =
+    {
+      <parameter><literal>2400</literal></parameter> |
+      <emphasis><parameter><literal>9600</literal></parameter></emphasis>
+    }
   </term>
   <listitem><para>
     Set the the baud rate to use when communicating with the LCD.
@@ -71,13 +69,7 @@ made in australia :-)
 
 <varlistentry>
   <term>
-    <command>Reboot</command> =
-    <arg choice="plain">
-    <group choice="req">
-      <arg choice="plain"><literal>yes</literal></arg>
-      <arg choice="plain"><literal><emphasis>no</emphasis></literal></arg>
-    </group>
-    </arg>
+    <property>Reboot</property> = &parameters.yesnodef;
   </term>
   <listitem><para>
     Reinitialize the LCD's BIOS [default: <literal>no</literal>; legal: <literal>yes</literal>, <literal>no</literal>]