Add some notes for the Windows port

Signed-off-by: Frediano Ziglio <fziglio@redhat.com>
Acked-by: Victor Toso <victortoso@redhat.com>

README.Windows.md

@@ -0,0 +1,31 @@
+SPICE server Windows support
+============================
+
+SPICE server was ported from Unix/Linux to Windows.
+
+Most features are present, with some exceptions:
+
+ - Unix sockets;
+ - signal handling;
+ - CLOEXEC flag (completely different handling on Windows);
+ - IPTOS_LOWDELAY flag (Linux specific);
+ - TCP_CORK (Linux/*BSD specific).
+
+Some features could be ported but currently are not:
+
+ - statistics exported through mapped files. Disabled by default and mainly
+   used for development;
+ - filtering while recording (SPICE_WORKER_RECORD_FILTER environment).
+   Recording is used for debugging or development work;
+ - TCP_KEEPIDLE setting. Default is used.
+
+To compile and use with Qemu you can follow the guide at
+https://wiki.qemu.org/Hosts/W32, just pass `--enable-spice` during
+configuration.
+
+To test using a Linux cross compiler you can install Wine and run test
+with
+
+```
+make LOG_COMPILE=wine check
+```