* fhandler.cc: Drop including nfs.h.

* fhandler_disk_file.cc: Ditto.
	(fhandler_base::fstat_by_nfs_ea): Use fattr3 from path_conv member,
	unless called from fstat.
	* path.cc: Drop including nfs.h.
	(symlink_info::check): Rearrange definition of file info buffers.
	Fetch fattr3 info for files on NFS and store in conv_hdl for later
	use in fhandler_base::fstat_by_nfs_ea.  Use fattr3 file type to
	recognize symlink on NFS and try to fetch symlink target only for
	actual symlinks.
	* path.h: Include nfs.h.
	(class path_conv_handle): Change file info storage to union of
	FILE_NETWORK_OPEN_INFORMATION and fattr3 structures.
	(path_conv_handle::fnoi): Align to aforementioned change.
	(path_conv_handle::nfsattr): New method.
	(path_conv::nfsattr): New method.

winsup/cygwin/fhandler.cc

@@ -28,7 +28,6 @@ details. */
 #include "ntdll.h"
 #include "cygtls.h"
 #include "sigproc.h"
-#include "nfs.h"
 
 static NO_COPY const int CHUNK_SIZE = 1024; /* Used for crlf conversions */