* path.cc (chdir): Always send unsigned chars to isspace since newlib's isspace

doesn't deal well with "negative" chars.
* fhandler.cc (fhandler_disk_file::open): Propagate remote status of file
garnered from path_conv.  Move #! checking to fstat.
(fhandler_disk_file::fstat): Reorganize st_mode setting to eliminate
duplication.  Move check for #! here from fhandler::open.
* fhandler.h (fhandler_base::isremote): New method.
(fhandler_base::set_isremote): Ditto.
(fhandler_base::set_execable_p): Also record "don't care if executable state".
(fhandler_base::dont_care_if_execable): New method.
* path.cc (path_conv::check): Clear new flags.  Appropriately set vol_flags,
drive_type, and is_remote_drive.
* path.h: Add new flags and methods for manipulating them.
* syscalls.cc (_unlink): Use isremote() to determine if a path is remote rather
than calling GetDriveType.
(stat_worker): Ditto.
* security.cc (get_file_attribute): Or attribute with result of NTReadEA to be
consistent with get_nt_attribute.

winsup/cygwin/ntea.cc

@@ -86,7 +86,7 @@ int __stdcall
 NTReadEA (const char *file, const char *attrname, char *attrbuf, int len)
 {
     /* return immediately if NTEA usage is turned off */
-    if (! allow_ntea)
+    if (!allow_ntea)
       return FALSE;
 
     HANDLE hFileSource;
@@ -257,7 +257,7 @@ BOOL __stdcall
 NTWriteEA (const char *file, const char *attrname, char *buf, int len)
 {
   /* return immediately if NTEA usage is turned off */
-  if (! allow_ntea)
+  if (!allow_ntea)
     return TRUE;
 
   HANDLE hFileSource;