glibc: Disable obsolete libcrypt implementation

I've not bothered to write an explanation for --disable-crypt because it
will likely be the default of Glibc-2.38, then we may drop it from the
command lines.

chapter05/glibc.xml

@@ -91,6 +91,7 @@ cd       build</userinput></screen>
       --build=$(../scripts/config.guess) \
       --enable-kernel=&min-kernel;               \
       --with-headers=$LFS/usr/include    \
+      --disable-crypt                    \
       libc_cv_slibdir=/usr/lib</userinput></screen>
 
     <variablelist>

chapter08/glibc.xml

@@ -79,6 +79,7 @@ cd       build</userinput></screen>
              --enable-kernel=&min-kernel;                     \
              --enable-stack-protector=strong          \
              --with-headers=/usr/include              \
+             --disable-crypt                          \
              libc_cv_slibdir=/usr/lib</userinput></screen>
 
     <variablelist>
@@ -489,7 +490,7 @@ mkdir -pv /etc/ld.so.conf.d</userinput></screen>
         <seg>ld-linux-x86-64.so.2, ld-linux.so.2,
         libBrokenLocale.{a,so}, libanl.{a,so},
         libc.{a,so}, libc_nonshared.a, libc_malloc_debug.so,
-        libcrypt.{a,so}, libdl.{a,so.2}, libg.a, libm.{a,so},
+        libdl.{a,so.2}, libg.a, libm.{a,so},
         libmcheck.a, libmemusage.so, libmvec.{a,so}, libnsl.so.1,
         libnss_compat.so, libnss_dns.so, libnss_files.so, libnss_hesiod.so,
         libpcprofile.so, libpthread.{a,so.0},
@@ -795,16 +796,6 @@ mkdir -pv /etc/ld.so.conf.d</userinput></screen>
         </listitem>
       </varlistentry>
 
-      <varlistentry id="libcrypt">
-        <term><filename class="libraryfile">libcrypt</filename></term>
-        <listitem>
-          <para>The cryptography library</para>
-          <indexterm zone="ch-system-glibc libcrypt">
-            <primary sortas="c-libcrypt">libcrypt</primary>
-          </indexterm>
-        </listitem>
-      </varlistentry>
-
       <varlistentry id="libdl">
         <term><filename class="libraryfile">libdl</filename></term>
         <listitem>