This commit does the following:

+ some rewordings, simplifications and typo fixes in "Users and Basic
  Account Management" section (discussed with wblock in ML [1]);
+ adds xml:ids to three examples and makes use of them;
+ nothing around "becoming superuser" -- that subchapter was rearranged
  in r42873;
+ deletes suddenly revived handbook/users directory (the first attempt
  was in r42953).

1. http://lists.freebsd.org/pipermail/freebsd-doc/2013-November/022881.html

en_US.ISO8859-1/books/handbook/basics/chapter.xml

@@ -428,8 +428,8 @@ console none                            unknown  off  secure</programlisting>
 
 	    <listitem>
 	      <para>The user name is typed at the
-		<prompt>login:</prompt> prompt.  User names must be
-		unique on the system as no two users can have the same
+		<prompt>login:</prompt> prompt.  Each user must have
+		a unique
 		user name.  There are a number of rules for creating
 		valid user names which are documented in
 		&man.passwd.5;.  It is recommended to use user names
@@ -443,9 +443,7 @@ console none                            unknown  off  secure</programlisting>
 	    <term>Password</term>
 
 	    <listitem>
-	      <para>Each user account should have an associated
-		password.  While the password can be blank, this is
-		highly discouraged.</para>
+	      <para>Each account has an associated password.</para>
 	    </listitem>
 	  </varlistentry>
 
@@ -496,9 +494,8 @@ console none                            unknown  off  secure</programlisting>
 	    <term>Password change time</term>
 
 	    <listitem>
-	      <para>By default, &os; does not force users to change
-		their passwords periodically.  Password expiration can
-		be enforced on a per-user basis using &man.pw.8;,
+	      <para>By default, passwords do not expire.  However,
+		password expiration can be enabled on a per-user basis,
 		forcing some or all users to change their passwords
 		after a certain amount of time has elapsed.</para>
 	    </listitem>
@@ -586,7 +583,7 @@ console none                            unknown  off  secure</programlisting>
 	  the superuser, since an extra space or missing character can
 	  mean irreparable data loss.</para>
 
-	<para>There are several ways to become gain superuser
+	<para>There are several ways to gain superuser
 	  privilege.  While one can log in as
 	  <systemitem class="username">root</systemitem>, this is
 	  highly discouraged.</para>
@@ -717,11 +714,12 @@ Password:
 	  <filename>/usr/share/skel</filename>, and can optionally
 	  mail the new user a welcome message.  This utility must be
 	  run as the
-	  <systemitem class="username">superuser</systemitem></para>
+	  <systemitem class="username">superuser</systemitem>.</para>
 
 	<para>The &man.adduser.8; utility is interactive and walks
 	  through the steps for creating a new user account.  As seen
-	  in Example 4.2, either input the required information or
+	  in <xref linkend="users-modifying-adduser"/>,
+	  either input the required information or
 	  press <keycap>Return</keycap> to accept the default value
 	  shown in square brackets.  In this example, the user has
 	  been invited into the
@@ -730,7 +728,7 @@ Password:
 	  access.  When finished, the utility will prompt to either
 	  create another user or to exit.</para>
 
-	<example>
+	<example xml:id="users-modifying-adduser">
 	  <title>Adding a User on &os;</title>
 
 	  <screen>&prompt.root; <userinput>adduser</userinput>
@@ -868,7 +866,7 @@ Removing user (jru): mailspool home passwd.
 
 	<para>When passed no options, aside from an optional username,
 	  &man.chpass.1; displays an editor containing user
-	  information.  When the user exists from the editor, the user
+	  information.  When the user exits from the editor, the user
 	  database is updated with the new information.</para>
 
 	<note>
@@ -877,15 +875,16 @@ Removing user (jru): mailspool home passwd.
 	    superuser.</para>
 	</note>
 
-	<para>In Example 4.4, the superuser has typed
+	<para>In <xref linkend="users-modifying-chpass-su"/>,
+	  the superuser has typed
 	  <command>chpass jru</command> and is now viewing the fields
 	  that can be changed for this user.  If
 	  <systemitem class="username">jru</systemitem> runs this
 	  command instead, only the last six fields will be displayed
-	  and available for editing.  This is shown in Example
-	  4.5.</para>
+	  and available for editing.  This is shown in
+	  <xref linkend="users-modifying-chpass-ru"/>.</para>
 
-	<example>
+	<example xml:id="users-modifying-chpass-su">
 	  <title>Using <command>chpass</command> as
 	    Superuser</title>
 
@@ -906,7 +905,7 @@ Home Phone:
 Other information:</screen>
 	</example>
 
-	<example>
+	<example xml:id="users-modifying-chpass-ru">
 	  <title>Using <command>chpass</command> as Regular
 	    User</title>
 
@@ -1165,8 +1164,8 @@ passwd: done</screen>
 	      &man.sysctl.8;.  Setting this limit too small may hinder
 	      a user's productivity as it is often useful to be logged
 	      in multiple times or to execute pipelines.  Some tasks,
-	      such as compiling a large program, spawn multiple
-	      processes and other intermediate preprocessors.</para>
+	      such as compiling a large program, start lots of
+	      processes.</para>
 	  </listitem>
 	</varlistentry>
 
@@ -1241,8 +1240,8 @@ passwd: done</screen>
 		<primary>limiting users</primary>
 		<secondary>sbsize</secondary>
 	      </indexterm>,
-	      a user may consume in order to limit network
-	      communications.</para>
+	      a user may consume.  This can be generally used to limit
+	      network communications.</para>
 	  </listitem>
 	</varlistentry>
 
@@ -1395,7 +1394,7 @@ teamtwo:*:1100:jru,db</screen>
       <para>In this example, the argument to <option>-m</option> is a
 	comma-delimited list of users who are to be added to the
 	group.  Unlike the previous example, these users are appended
-	to the group list and do not replace the list of existing
+	to the group and do not replace existing
 	users in the group.</para>
 
       <example>

en_US.ISO8859-1/books/handbook/users/Makefile

@@ -1,15 +0,0 @@
-#
-# Build the Handbook with just the content from this chapter.
-#
-# $FreeBSD$
-#
-
-CHAPTERS= 	users/chapter.xml
-
-VPATH=		..
-
-MASTERDOC=	${.CURDIR}/../${DOC}.${DOCBOOKSUFFIX}
-
-DOC_PREFIX?= 	${.CURDIR}/../../../..
-
-.include "../Makefile"