v4l-utils: several tweaks to the page

- Change the formatting for the meson command to be standard with other
  pages in the book
- Fix the commands for installing the contrib files (no sdlcam since we
  don't have SDL_Image in the book, remove $DESTDIR, etc)
- Add command explanations for the two contrib utilities
- Remove extraneous spaces in between commands

multimedia/libdriv/v4l-utils.xml

@@ -122,9 +122,11 @@
 
 <screen><userinput>mkdir build &amp;&amp;
 cd    build &amp;&amp;
-meson setup --prefix=/usr -Ddoxygen-doc=disabled \
-            -Dgconv=disabled --buildtype=release ..
 
+meson setup --prefix=/usr          \
+            -Ddoxygen-doc=disabled \
+            -Dgconv=disabled       \
+            --buildtype=release    .. &amp;&amp;
 ninja</userinput></screen>
 
 
@@ -136,15 +138,15 @@ ninja</userinput></screen>
       Now, as the <systemitem class="username">root</systemitem> user:
     </para>
 
-<screen role="root"><userinput>ninja  install</userinput></screen>
+<screen role="root"><userinput>ninja install</userinput></screen>
 
     <para>
       If you also wish to install the contrib programs, add:
     </para>
 
-<screen role="root"><userinput>for prog in sdlcam  v4l2gl  v4l2grab
+<screen role="root"><userinput>for prog in v4l2gl v4l2grab
 do
-	cp -v contrib/test/$prog $DESTDIR/usr/bin/.
+   cp -v contrib/test/$prog /usr/bin
 done</userinput></screen>
 
 
@@ -190,7 +192,9 @@ done</userinput></screen>
           rds-ctl,
           v4l2-compliance,
           v4l2-ctl,
-          v4l2-dbg, and
+          v4l2-dbg,
+          v4l2gl,
+          v4l2grab, and
           v4l2-sysfs-path
         </seg>
         <seg>
@@ -404,6 +408,32 @@ done</userinput></screen>
         </listitem>
       </varlistentry>
 
+      <varlistentry id="v4l2gl">
+        <term><command>v4l2gl</command></term>
+        <listitem>
+          <para>
+            captures images using libv4l and stores them as PPM files
+          </para>
+          <indexterm zone="v4l-utils v4l2gl">
+            <primary sortas="b-v4l2gl">v4l2gl</primary>
+          </indexterm>
+        </listitem>
+      </varlistentry>
+
+      <varlistentry id="v4l2grab">
+        <term><command>v4l2grab</command></term>
+        <listitem>
+          <para>
+            captures images using libv4l and stores them as PPM files, while
+            also allowing for additonal options such as setting the amount of
+            frames captured and saving the file as a RAW file
+          </para>
+          <indexterm zone="v4l-utils v4l2grab">
+            <primary sortas="b-v4l2grab">v4l2grab</primary>
+          </indexterm>
+        </listitem>
+      </varlistentry>
+
       <varlistentry id="v4l2-sysfs-path">
         <term><command>v4l2-sysfs-path</command></term>
         <listitem>