Cygwin: Disable creating case-sensitive folders by default

Inspecting the content of case-sensitive directories
on remote machines results in lots of errors like
disappearing diretories and files, file not found, etc.

This is not feasible as default behaviour

Signed-off-by: Corinna Vinschen <corinna@vinschen.de>

winsup/cygwin/fhandler_disk_file.cc

@@ -1778,6 +1778,12 @@ fhandler_disk_file::mkdir (mode_t mode)
       pc.file_attributes (FILE_ATTRIBUTE_DIRECTORY);
       if (has_acls ())
 	set_created_file_access (dir, pc, mode & 07777);
+#if 0
+      /* FIXME: This default behaviour badly breaks interoperability.
+		Inspecting the content of case-sensitive directories
+		on remote machines results in lots of errors like
+		disappearing diretories and files, file not found, etc. */
+
       /* Starting with Windows 10 1803, try to create all dirs below the
          installation root as case-sensitive.  If STATUS_NOT_SUPPORTED
 	 is returned, WSL isn't installed (unfortunately a requirement
@@ -1808,6 +1814,7 @@ fhandler_disk_file::mkdir (mode_t mode)
 		}
 	    }
 	}
+#endif
       NtClose (dir);
       res = 0;
     }

winsup/cygwin/release/3.0.2

@@ -5,6 +5,14 @@ What's new:
 What changed:
 -------------
 
+- Windows 10 1803 or later and WSL installed:
+
+  Starting with 3.0.0, mkdir(2) automatically created directories within
+  the Cygwin installation dir as case sensitive.  This badly breaks
+  interoperability with remote machines trying to access these dirs.
+  Therefore, disable this as default.  You can still create case-sensitive
+  dirs via `chattr +C ...'
+
 
 Bug Fixes
 ---------

winsup/doc/new-features.xml

@@ -15,11 +15,8 @@ CLOCK_BOOTTIME_ALARM clocks.
 </para></listitem>
 
 <listitem><para>
-Support for case sensitive directories.  mkdir(2) automatically creates
-directories within the Cygwin installation dir as case sensitive
-now.</para>
-
-<para>This feature requires Windows 10 1803 or later and WSL installed!
+Support for case sensitive directories via chattr(1).  This feature requires
+Windows 10 1803 or later and WSL installed.
 </para></listitem>
 
 <listitem><para>