MSDOSFSMNT_ALLOWDIRX  100 msdosfs/msdosfsmount.h #define MSDOSFSMNT_ALLOWDIRX	0x10
MSDOSFSMNT_ALLOWDIRX  225 sys/mount.h    #define MSDOSFSMNT_ALLOWDIRX	0x10	/* dir is mode +x if r */