Add a command explanation for 'pwait'

git-svn-id: http://svn.linuxfromscratch.org/LFS/trunk/BOOK@12135 4aa44e1e-78dd-0310-a6d2-fbcd4c07a689

chapter01/changelog.xml

@@ -46,6 +46,9 @@
     <listitem>
       <itemizedlist>
       <para>2021-02-14</para>
+        <listitem>
+          <para>[renodr] - Add a command explanation for 'pwait'.</para>
+        </listitem>
         <listitem>
           <para>[bdubbs] - Update to util-linux-2.36.2. Fixes
           <ulink url="&lfs-ticket-root;4812">#4812</ulink>.</para>

chapter08/procps.xml

@@ -188,6 +188,16 @@ ln -sfv ../../lib/$(readlink /usr/lib/libprocps.so) /usr/lib/libprocps.so</useri
         </listitem>
       </varlistentry>
 
+      <varlistentry id="pwait">
+        <term><command>pwait</command></term>
+        <listitem>
+          <para>Waits for a process to finish before executing.</para>
+          <indexterm zone="ch-system-procps pwait">
+            <primary sortas="b-pwait">pwait</primary>
+          </indexterm>
+        </listitem>
+      </varlistentry>
+
       <varlistentry id="pwdx">
         <term><command>pwdx</command></term>
         <listitem>