* NEWS, src/useradd.c, man/useradd.8.xml: add -Z option to map

SELinux user for user's login.
	* NEWS, src/usermod.c, man/usermod.8.xml: Likewise.
	* libmisc/system.c, libmisc/Makefile.am, lib/prototypes.h: Added
	safe_system(). Used to run semanage.
	* lib/prototypes.h, libmisc/copydir.c: Make a
	selinux_file_context() an extern function.
	* libmisc/copydir.c: Reset SELinux to create files with default
	contexts at the end of copy_tree().
	* NEWS, src/userdel.c: Delete the SELinux user mapping for user's
	login.

man/useradd.8.xml

@@ -459,6 +459,19 @@
 	  </para>
 	</listitem>
       </varlistentry>
+      <varlistentry>
+	<term>
+	  <option>-Z</option>, <option>--selinux-user</option>
+	  <replaceable>SEUSER</replaceable>
+	</term>
+	<listitem>
+	  <para>
+	    The SELinux user for the user's login. The default is to leave this
+	    field blank, which causes the system to select the default SELinux
+	     user.
+	  </para>
+	</listitem>
+      </varlistentry>
     </variablelist>
 
     <refsect2 id='changing_the_default_values'>