* path.cc (path_conv::check): Move fs-specific settings to a point where we

know that we have filled out the filesystem information.
* path.h (path_conv::path_conv): Use consistent initialization for
constructors.
* include/sys/cygwin.h: Define CW_STRERROR.
* include/cygwin/version.h: Bump CYGWIN_VERSION_API_MINOR to 228.
* include/external.h: Implement CW_STRERROR.

winsup/cygwin/include/sys/cygwin.h

@@ -148,7 +148,8 @@ typedef enum
     CW_GET_INSTKEY,
     CW_INT_SETLOCALE,
     CW_CVT_MNT_OPTS,
-    CW_LST_MNT_OPTS
+    CW_LST_MNT_OPTS,
+    CW_STRERROR
   } cygwin_getinfo_types;
 
 /* Token type for CW_SET_EXTERNAL_TOKEN */