OK, final change to error codes for a while I hope.

- remove private/kernel/Errors.h as this was just plain wrong to have it
  there and confused issues somewhat.
- add the kerrors.h file that has kernel only error codes, namely the
  ERR_ codes from newos.
- add comments for the other header files to tell people where to find
  error code definitions in an attempt to stop people getting lost!


git-svn-id: file:///srv/svn/repos/haiku/trunk/current@101 a95241bf-73f2-0310-859d-f6bbb57e9c96

headers/posix/errno.h

@@ -3,6 +3,10 @@
  *
  * POSIX style error codes.
  * Be values used where required to keep compatibility.
+ *
+ * Errors beginning with B_ can be found in os/support/Errors.h
+ * those starting with ERR_ are kernel only and are found in
+ * private/kernel/kerrors.h
  */
 
 #ifndef _POSIX_ERRNO_H
@@ -128,7 +132,7 @@ enum {
 	ENOTEMPTY,
 	ENOSPC,
 	EROFS,
-	EMFILE,
+	EMFILE = EBADF + 10,
 	EXDEV,
 	ELOOP,
 	EPIPE