* NEWS, src/chsh.c, man/chsh.1.xml: Add --root option.

chsh's usage split in smaller messages.
	* src/chsh.c: The getopt index of long options is not used.

man/chsh.1.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <!--
    Copyright (c) 1990       , Julianne Frances Haugh
-   Copyright (c) 2007 - 2008, Nicolas François
+   Copyright (c) 2007 - 2011, Nicolas François
    All rights reserved.
   
    Redistribution and use in source and binary forms, with or without
@@ -84,6 +84,19 @@
 	  <para>Display help message and exit.</para>
 	</listitem>
       </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-R</option>, <option>--root</option>
+	  <replaceable>CHROOT_DIR</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    Apply changes in the <replaceable>CHROOT_DIR</replaceable>
+	    directory and use the configuration files from the
+	    <replaceable>CHROOT_DIR</replaceable> directory.
+	  </para>
+	</listitem>
+      </varlistentry>
       <varlistentry>
 	<term>
 	  <option>-s</option>, <option>--shell</option> <replaceable>SHELL</replaceable>