Update list of unsupported systems. Fixes #1510853.

README

@@ -226,13 +226,13 @@ compilers from the vendor, or one of the free compilers (gcc).
 Unsupported systems
 -------------------
 
-XXX This section is out of date!
-
-A number of features are not supported in Python 2.3 anymore. Some
-support code is still present, but will be removed in Python 2.4. 
+A number of features are not supported in Python 2.5 anymore. Some
+support code is still present, but will be removed in Python 2.6. 
 If you still need to use current Python versions on these systems,
 please send a message to python-dev@python.org indicating that you
-volunteer to support this system.
+volunteer to support this system. For a more detailed discussion 
+regarding no-longer-supported and resupporting platforms, as well
+as a list of platforms that became or will be unsupported, see PEP 11.
 
 More specifically, the following systems are not supported any
 longer:
@@ -240,6 +240,7 @@ longer:
 - DYNIX
 - dgux
 - Minix
+- NeXT
 - Irix 4 and --with-sgi-dl
 - Linux 1
 - Systems defining __d6_pthread_create (configure.in)
@@ -247,6 +248,25 @@ longer:
   or PY_PTHREAD_D7 in thread_pthread.h
 - Systems using --with-dl-dld
 - Systems using --without-universal-newlines
+- MacOS 9
+
+The following systems are still supported in Python 2.5, but
+support will be dropped in 2.6:
+- Systems using --with-wctype-functions
+- Win9x, WinME
+
+Warning on install in Windows 98 and Windows Me
+-----------------------------------------------
+
+Following Microsoft's closing of Extended Support for
+Windows 98/ME (July 11, 2006), Python 2.6 will stop
+supporting these platforms. Python development and
+maintainability becomes easier (and more reliable) when
+platform specific code targeting OSes with few users
+and no dedicated expert developers is taken out. The
+vendor also warns that the OS versions listed above
+"can expose customers to security risks" and recommends
+upgrade.
 
 Platform specific notes
 -----------------------
@@ -426,14 +446,6 @@ UnixWare: There are known bugs in the math library of the system, as well as
         thread may interrupt system calls in others). Therefore, test_math and
         tests involving threads will fail until those problems are fixed.
 
-SunOS 4.x: When using the SunPro C compiler, you may want to use the
-        '-Xa' option instead of '-Xc', to enable some needed non-ANSI
-        Sunisms.
-        THIS SYSTEM IS NO LONGER SUPPORTED.
-
-NeXT:   Not supported anymore. Start with the MacOSX/Darwin code if you
-        want to revive it.
-
 QNX:    Chris Herborth (chrish@qnx.com) writes:
         configure works best if you use GNU bash; a port is available on
         ftp.qnx.com in /usr/free.  I used the following process to build,