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/svga.docbook

@@ -16,8 +16,8 @@ svga chipset.
 <variablelist>
 <varlistentry>
   <term>
-    <command>Mode</command> =
-    <arg choice="plain"><replaceable>SCGALIB-MODE</replaceable></arg>
+    <property>Mode</property> =
+    <parameter><replaceable>SCGALIB-MODE</replaceable></parameter>
   </term>
   <listitem><para>
     svgalib mode to use [default: <literal>G320x240x256</literal>]
@@ -29,12 +29,7 @@ svga chipset.
 
 <varlistentry>
   <term>
-    <command>Size</command> =
-    <arg choice="plain">
-      <replaceable>WIDTH</replaceable>
-      <literal>x</literal>
-      <replaceable>HEIGHT</replaceable>
-    </arg>
+    <property>Size</property> = &parameters.size;
   </term>
   <listitem><para>
     set display size [default: <literal>20x4</literal>]
@@ -43,8 +38,8 @@ svga chipset.
 
 <varlistentry>
   <term>
-    <command>Contrast</command> =
-    <arg choice="plain"><replaceable>CONTRAST</replaceable></arg>
+    <property>Contrast</property> =
+    <parameter><replaceable>CONTRAST</replaceable></parameter>
   </term>
   <listitem><para>
     Set the initial contrast.
@@ -59,8 +54,8 @@ svga chipset.
 
 <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>1000</literal>; legal: <literal>1</literal> - <literal>1000</literal>]
@@ -69,8 +64,8 @@ svga chipset.
 
 <varlistentry>
   <term>
-    <command>OffBrightness</command> =
-    <arg choice="plain"><replaceable>BRIGHTNESS</replaceable></arg>
+    <property>OffBrightness</property> =
+    <parameter><replaceable>BRIGHTNESS</replaceable></parameter>
   </term>
   <listitem><para>
     Set the initial off-brightness [default: <literal>500</literal>; legal: <literal>1</literal> - <literal>1000</literal>]