Update Document and README.

Documentation/NuttX.html

@@ -8,7 +8,7 @@
   <tr align="center" bgcolor="#e4e4e4">
     <td>
       <h1><big><font color="#3c34ec"><i>NuttX RTOS</i></font></big></h1>
-      <p>Last Updated: June 5, 2017</p>
+      <p>Last Updated: July 8, 2017</p>
     </td>
   </tr>
 </table>
@@ -796,6 +796,14 @@
     </p>
   </td>
 </tr>
+<tr>
+  <td><br></td>
+  <td>
+    <p>
+      <li>IP Forwarding.</li>
+    </p>
+  </td>
+</tr>
 <tr>
   <td><br></td>
   <td>

README.txt

@@ -20,6 +20,7 @@ README
     - Make Sure that You on on the Right Platform
     - Comparing Two Configurations
     - Making defconfig Files
+    - Configuring with "Compressed" defconfig Files
     - Incompatibilities with Older Configurations
     - NuttX Configuration Tool under DOS
   o Toolchains
@@ -896,6 +897,27 @@ Making defconfig Files
    If the default settings change, and they often do, then the original
    .config may not be reproducible.
 
+Configuring with "Compressed" defconfig Files
+---------------------------------------------
+
+  As described in the previous section, "Making defconfig Files," defconfig
+  files may be "compressed" using 'make savedeconfig'.  This compressed
+  defconfig files are will may not be fully usable and may not build the
+  target binaries that you want because the compression process removed all
+  of the default settings from the defconfig file.  To restore the default
+  settings, you should run the following after configuring:
+
+    make olddefconfig
+
+  That will restore the the missing defaulted value.
+
+  Using this command after configuring is generally a good practice anyway:
+  Even if the defconfig files are not "compressed" in this fashion, there
+  the defconfig file may be old and the only way to assure that the
+  installed .config is via 'make oldconfig' or 'make olddefconfig'.  See the
+  paragraph above entitled ""Refreshing Configurations" for additional
+  information.
+
 Incompatibilities with Older Configurations
 -------------------------------------------