Tweak instructions for e2fsprogs and perl

was r11613.

chapter06/e2fsprogs.xml

@@ -62,7 +62,6 @@ PKG_CONFIG_PATH=/tools/lib/pkgconfig \
              --disable-libblkid      \
              --disable-libuuid       \
              --disable-uuidd         \
-             --with-crond-dir=no     \
              --disable-fsck</userinput></screen>
 
     <variablelist>
@@ -98,13 +97,6 @@ PKG_CONFIG_PATH=/tools/lib/pkgconfig \
         </listitem>
       </varlistentry>
 
-      <varlistentry>
-        <term><parameter>--with-crond-dir=no</parameter></term>
-        <listitem>
-          <para>This disables the installation of an unneded file.</para>
-        </listitem>
-      </varlistentry>
-
       <varlistentry>
         <term><parameter>--disable-*</parameter></term>
         <listitem>

chapter06/perl.xml

@@ -63,10 +63,6 @@ export BUILD_BZIP2=0</userinput></screen>
 <screen><userinput remap="pre">patch -Np1 -i ../&perl-gcc5-fixes-patch;</userinput></screen>
 -->
 
-    <para>进行修改，使得最新版本的 gcc 能够正确构建该程序：</para>
-
-<screen><userinput remap="pre">sed -i 's/67]/6789]/' Configure</userinput></screen>
-
     <!--para>To have full control over the way Perl is set up, you can remove the
     <quote>-des</quote> options from the following command and hand-pick the way
     this package is built. Alternatively, use the command exactly as below to