* man/pwconv.8.xml: Fix typos.

* man/chpasswd.8.xml, man/chgpasswd.8.xml: Document the NONE crypt
  method.
* man/login.defs.d/MAIL_DIR.xml: Add comment regarding useradd not
  using MAIL_FILE.
* man/login.defs.d/ERASECHAR.xml, man/login.defs.d/KILLCHAR.xml,
  man/login.defs.d/CONSOLE_GROUPS.xml, man/login.defs.d/ENV_HZ.xml,
  man/login.defs.d/ENV_PATH.xml, man/login.defs.d/ENV_SUPATH.xml:
  These variables are also used by some tools when compiled with PAM
  support.
* man/login.defs.d/ENV_HZ.xml: Add note that it is only used by
  sulogin when compiled with PAM support.
* man/login.defs.d/ENV_SUPATH.xml: Typos: ENV_PATH -> ENV_SUPATH,
  and mention sbin in the path.
* man/login.defs.d/LOGIN_STRING.xml: Fix typo: confition ->
  condition.
* man/sg.1.xml: Add CONFIGURATION section (SYSLOG_SG_ENAB).
* man/su.1.xml: ENV_HZ, LOGIN_STRING, MAIL_DIR, USERGROUPS_ENAB
  are only used when su is compiled without PAM support.
* man/login.defs.5.xml: Added variables: OBSCURE_CHECKS_ENAB
  PASS_ALWAYS_WARN PASS_CHANGE_TRIES SULOG_FILE SU_NAME
  SU_WHEEL_ONLY SYSLOG_SG_ENAB SYSLOG_SU_ENAB.
* man/login.defs.5.xml: ENVIRON_FILE is only used when compiled
  without PAM support.
* man/login.defs.5.xml: sulogin uses variables even when compiled
  with PAM support.
* man/login.1.xml: ENV_HZ ENV_PATH ENV_SUPATH MAIL_DIR UMASK are
  only used when login is not compiled with PAM support.

man/chgpasswd.8.xml

@@ -67,8 +67,8 @@
 	<listitem>
 	  <para>Use the specified method to encrypt the passwords.</para>
 	  <para>
-	    The available methods are DES, MD5, and SHA256 or SHA512
-	    if compiled with the ENCRYPTMETHOD_SELECT flag.
+	    The available methods are DES, MD5, NONE, and SHA256 or SHA512
+	    if your libc support these methods.
 	  </para>
 	</listitem>
       </varlistentry>