jsonrpc-s: extended docs for fifo_name parameter

modules/jsonrpc-s/README

@@ -171,7 +171,8 @@ modparam("jsonrpc-s", "transport", 1)
 3.3. fifo_name (str)
 
    The name of the FIFO file to be created for listening and reading
-   external commands.
+   external commands. If the given path is not absolute, the fifo file is
+   created relative to run_dir (global parameter).
 
    Default value is NONE.
 

modules/jsonrpc-s/doc/jsonrpc-s_admin.xml

@@ -138,7 +138,8 @@ modparam("jsonrpc-s", "transport", 1)
 		<title><varname>fifo_name</varname> (str)</title>
 		<para>
 		The name of the FIFO file to be created for listening and 
-		reading external commands.
+		reading external commands. If the given path is not absolute,
+		the fifo file is created relative to run_dir (global parameter).
 		</para>
 		<para>
 		<emphasis>