add -l at 66-tree, update doc

doc/html/66-tree.html

@@ -23,7 +23,7 @@
     
 <h2> Interface </h2>
 	<pre>
-	66-tree [ -h ] [ -v <em>verbosity</em> ] [ -n|R ] [ -a|d ] [ -c ] [ -E|D ] [ -U ] [ -C <em>clone</em> ] <em>tree</em>
+	66-tree [ -h ] [ -v <em>verbosity</em> ] [ -l ] [ -n|R ] [ -a|d ] [ -c ] [ -E|D ] [ -U ] [ -C <em>clone</em> ] <em>tree</em>
 	</pre>
 
 	<p>
@@ -45,7 +45,15 @@
 		error messages. <tt>2</tt>: Also print warning messages. 
 		<tt>3</tt>: Also print debugging messages.
 	 </li>
-	 
+	 <li>
+		<tt><b>-l <em>live</em></b></tt> : an absolute path. It used 
+		in conjunction with <tt>-U</tt> and <tt>-R</tt> options to specify the live 
+		directory place of <em>tree</em>. It has no effects otherwise. 
+		Default is <tt>%%livedir%%</tt>.
+		The default can also be changed at compile-time by	passing the 
+		<tt>&#8209;&#8209;livedir=<em>live</em></tt> option to <tt>./configure</tt>. 
+		Should be available within a writable filesystem - likely a RAM filesystem.
+	</li>
 	 <li>
 		<tt>-n&nbsp;</tt>&nbsp;: creates a new empty <em>tree</em>. The new <em>tree</em>
 		must not exist on the system.

doc/man/66-tree.1.scd

@@ -6,7 +6,7 @@
 
 # SYNOPSYS
 
-66-tree [ *-h* ] [ *-v* _verbosity_ ] [ *-n* | *-R* ] [ *-a* | *-d* ] [ *-c* _clone_ ] [ *-E* | *-D* ] [ *-U* ] [ *-C* ] _tree_
+66-tree [ *-h* ] [ *-v* _verbosity_ ] [ -l ] [ *-n* | *-R* ] [ *-a* | *-d* ] [ *-c* _clone_ ] [ *-E* | *-D* ] [ *-U* ] [ *-C* ] _tree_
 
 # DESCRIPTION
 
@@ -26,6 +26,13 @@ are currently available on the system use *66-info*(1) tool.
 	*2* : Also print warning messages.
 	*3* : Also print debugging messages.
 
+*-l* _live_
+	An absolute path. It used in conjunction with *-U* and *-R* options 
+	to specify the live	directory place of _tree_. It has no effects otherwise.
+	Default is *%%livedir%%*. The default can also be changed at compile-time
+	by passing the \--livedir=_live_ option to *./configure*. Should be under
+	a writable filesystem - likely a RAM filesystem.
+	
 *-n*
 	Creates a new empty _tree_. The new _tree_ must not exist on the system.