doc/user: document the "fifo" output

doc/mpd.conf.5

@@ -420,17 +420,6 @@ default is "".
 This specifies how many bytes to write to the audio device at once.  This
 parameter is to work around a bug in older versions of libao on sound cards
 with very small buffers.  The default is 1024.
-.SH REQUIRED FIFO OUTPUT PARAMETERS
-.TP
-.B path <path>
-This specifies the path of the FIFO to output to.  Must be an absolute path.
-If the path does not exist it will be created when mpd is started, and removed
-when mpd is stopped.  The FIFO will be created with the same user and group as
-mpd is running as.  Default permissions can be modified by using the builtin
-shell command "umask".  If a FIFO already exists at the specified path it will
-be reused, and will \fBnot\fP be removed when mpd is stopped.  You can use the
-"mkfifo" command to create this, and then you may modify the permissions to
-your liking.
 .SH REQUIRED SHOUT OUTPUT PARAMETERS
 .TP
 .B name <name>

doc/user.xml

@@ -1408,6 +1408,38 @@ systemctl start mpd.socket</programlisting>
           FIFO (First In, First Out) file.  The data can be read by
           another program.
         </para>
+
+        <informaltable>
+          <tgroup cols="2">
+            <thead>
+              <row>
+                <entry>Setting</entry>
+                <entry>Description</entry>
+              </row>
+            </thead>
+            <tbody>
+              <row>
+                <entry>
+                  <varname>path</varname>
+                  <parameter>P</parameter>
+                </entry>
+                <entry>
+                  This specifies the path of the FIFO to write to.
+                  Must be an absolute path.  If the path does not
+                  exist, it will be created when MPD is started, and
+                  removed when MPD is stopped.  The FIFO will be
+                  created with the same user and group as MPD is
+                  running as.  Default permissions can be modified by
+                  using the builtin shell command "umask".  If a FIFO
+                  already exists at the specified path it will be
+                  reused, and will not be removed when MPD is stopped.
+                  You can use the "mkfifo" command to create this, and
+                  then you may modify the permissions to your liking.
+                </entry>
+              </row>
+            </tbody>
+          </tgroup>
+        </informaltable>
       </section>
 
       <section>