update / rephrase cygwin / WSL status, fixes #3174

README.rst

@@ -78,8 +78,8 @@ Main features
     * Mac OS X
     * FreeBSD
     * OpenBSD and NetBSD (no xattrs/ACLs support or binaries yet)
-    * Cygwin (not supported, no binaries yet)
-    * Linux Subsystem of Windows 10 (not supported)
+    * Cygwin (experimental, no binaries yet)
+    * Linux Subsystem of Windows 10 (experimental)
 
 **Free and Open Source Software**
   * security and functionality can be audited independently

docs/installation.rst

@@ -261,8 +261,7 @@ Cygwin
 ++++++
 
 .. note::
-    Running under Cygwin is experimental and has only been tested with Cygwin
-    (x86-64) v2.5.2. Remote repositories are known broken, local repositories should work.
+    Running under Cygwin is experimental and has not been tested much yet.
 
 .. todo:: Add zeromq, use python 3.5 or 3.6