Add info about ftp.gnu.org DDOS.

chapter03/introduction.xml

@@ -37,6 +37,28 @@
   alternative means of downloading at <ulink
   url="&lfs-root;lfs/mirrors.html#files"/>. </para>
 
+  <important>
+    <para>
+      Listed on the next page are several important packages located at
+      ftp.gnu.org.  That site is the canonical locaton of the
+      subject packages but has been affected by a long term
+      distributed denial of services (DDOS) attack.  See
+      <ulink url="https://news.slashdot.org/story/25/07/06/1737253/the-fsf-faces-active-ongoing-and-increasing-ddos-attacks">slashdot news</ulink> for details.
+    </para>
+
+    <para>
+      An alternative for ftp.gnu.org is to use one of the mirrors for that
+      site.  A list of mirrors is located at 
+      <ulink url="https://www.gnu.org/prep/ftp.en.html"/>
+    </para>
+
+    <para>
+      If you choose to use the wget list described below, that file will
+      also need to be modified to use your desired mirror.
+    </para>
+    
+  </important>
+
   <para>Downloaded packages and patches will need to be stored somewhere
   that is conveniently available throughout the entire build. A working
   directory is also required to unpack the sources and build them.

chapter08/libelf.xml

@@ -56,7 +56,7 @@
 
     <para>To test the results, issue:</para>
 
-<screen><userinput remap="test">make check</userinput></screen>
+<screen><userinput remap="test">make -k check</userinput></screen>
 
     <para>Two tests are known to fail, dwarf_srclang_check and 
     run-backtrace-native-core.sh.</para>