* man/login.defs.d/CONSOLE_GROUPS.xml,

man/login.defs.d/CONSOLE.xml, man/login.defs.d/DEFAULT_HOME.xml,
  man/login.defs.d/ENV_HZ.xml, man/login.defs.d/ENVIRON_FILE.xml,
  man/login.defs.d/ENV_PATH.xml, man/login.defs.d/ENV_SUPATH.xml,
  man/login.defs.d/ENV_TZ.xml, man/login.defs.d/ERASECHAR.xml,
  man/login.defs.d/FAIL_DELAY.xml,
  man/login.defs.d/FAILLOG_ENAB.xml,
  man/login.defs.d/FAKE_SHELL.xml, man/login.defs.d/FTMP_FILE.xml,
  man/login.defs.d/HUSHLOGIN_FILE.xml,
  man/login.defs.d/ISSUE_FILE.xml, man/login.defs.d/KILLCHAR.xml,
  man/login.defs.d/LASTLOG_ENAB.xml, man/login.defs.d/LOGIN_RETRIES.xml,
  man/login.defs.d/LOGIN_TIMEOUT.xml, man/login.defs.d/LOG_OK_LOGINS.xml,
  man/login.defs.d/LOG_UNKFAIL_ENAB.xml,
  man/login.defs.d/MAIL_CHECK_ENAB.xml, man/login.defs.d/MOTD_FILE.xml,
  man/login.defs.d/NOLOGINS_FILE.xml,
  man/login.defs.d/OBSCURE_CHECKS_ENAB.xml,
  man/login.defs.d/PASS_ALWAYS_WARN.xml,
  man/login.defs.d/PASS_CHANGE_TRIES.xml,
  man/login.defs.d/PASS_MAX_LEN.xml,
  man/login.defs.d/PORTTIME_CHECKS_ENAB.xml,
  man/login.defs.d/QUOTAS_ENAB.xml, man/login.defs.d/SULOG_FILE.xml,
  man/login.defs.d/SU_NAME.xml, man/login.defs.d/SU_WHEEL_ONLY.xml,
  man/login.defs.d/SYSLOG_SG_ENAB.xml,
  man/login.defs.d/SYSLOG_SU_ENAB.xml,
  man/login.defs.d/TTYGROUP.xml, man/login.defs.d/TTYTYPE_FILE.xml,
  man/login.defs.d/ULIMIT.xml, man/login.defs.d/USERGROUPS_ENAB.xml:
  New documentation of login.defs variables.
* man/login.defs.d/MAIL_DIR.xml: Updated. It now contains the
  MAIL_FILE documentation.
* man/login.defs.d/LOGIN_STRING.xml: Updated. Mentions %s.
* man/pwconv.8.xml, man/groupmems.8.xml, man/groupdel.8.xml,
  man/useradd.8.xml, man/pwck.8.xml, man/groupadd.8.xml,
  man/sulogin.8.xml, man/newgrp.1.xml, man/usermod.8.xml,
  man/su.1.xml, man/vipw.8.xml, man/passwd.1.xml,
  man/groupmod.8.xml, man/login.1.xml, man/userdel.8.xml,
  man/grpck.8.xml: Added CONFIGURATION section.
* man/generate_mans.mak: The generations of manpages depends on
  the variables from the Makefiles. Add the dependency on Makefile.
* man/login.defs.5.xml: New login.defs variable documented.
* man/Makefile.am: Added XML variable documentation to the
  distributed files.

man/userdel.8.xml

@@ -1,4 +1,11 @@
 <?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE refentry PUBLIC "-//OASIS//DTD DocBook V4.5//EN"
+  "http://www.oasis-open.org/docbook/xml/4.5/docbookx.dtd" [
+<!ENTITY MAIL_DIR              SYSTEM "login.defs.d/MAIL_DIR.xml">
+<!ENTITY MAX_MEMBERS_PER_GROUP SYSTEM "login.defs.d/MAX_MEMBERS_PER_GROUP.xml">
+<!ENTITY USERDEL_CMD           SYSTEM "login.defs.d/USERDEL_CMD.xml">
+<!ENTITY USERGROUPS_ENAB       SYSTEM "login.defs.d/USERGROUPS_ENAB.xml">
+]>
 <refentry id='userdel.8'>
   <!-- $Id$ -->
   <refmeta>
@@ -85,6 +92,21 @@
     </variablelist>
   </refsect1>
 
+  <refsect1 id='configuration'>
+    <title>CONFIGURATION</title>
+    <para>
+      The following configuration variables in
+      <filename>/etc/login.defs</filename> change the behavior of this
+      tool:
+    </para>
+    <variablelist>
+      &MAIL_DIR; <!-- documents also MAIL_FILE -->
+      &MAX_MEMBERS_PER_GROUP;
+      &USERDEL_CMD;
+      &USERGROUPS_ENAB;
+    </variablelist>
+  </refsect1>
+
   <refsect1 id='files'>
     <title>FILES</title>
     <variablelist>