Preliminary update to FAQ to reflect latest net release.

(So far, just a new title, some minor updates, and a disclaimer in each
section that has to be updated for the net release, or at least looked at.)

winsup/doc/install.texinfo

@@ -1,6 +1,9 @@
 @chapter Installation Instructions
 @section Contents
 
+@strong{(Please note: This section has not yet been updated for the latest
+net release.)}
+
 The following packages are included in the full release:
 
 Development tools:
@@ -18,6 +21,9 @@ these two units.
 
 @section Installing the binary release:
 
+@strong{(Please note: This section has not yet been updated for the latest
+net release.)}
+
 Important!  Be sure to remove any older versions of the Cygwin tools
 from your PATH environment variable so you do not execute them by
 mistake.
@@ -89,6 +95,9 @@ via the "Add/Remove Programs" control panel.
 
 @section Installing the source code
 
+@strong{(Please note: This section has not yet been updated for the latest
+net release.)}
+
 Before downloading the source code corresponding to the release,
 you should install the latest release of the tools (either the full
 release or just the user tools).
@@ -134,6 +143,9 @@ And you should be done...
 
 @section Upgrading to B20.1
 
+@strong{(Please note: This section has not yet been updated for the latest
+net release.  Even the section's title is wrong!)}
+
 If you downloaded the original B20.0 release, you should definitely at
 least upgrade the Cygwin library to the version present in B20.1.  To do
 this, download the file