Structs starting with `d' in bsd/hfs

• DeferredTask bsd/hfs/hfs_macos_defs.h:816
• DInfo bsd/hfs/hfs_macos_defs.h:891
• directoryInfoSpec bsd/hfs/hfs.h:475
• DXInfo bsd/hfs/hfs_macos_defs.h:899