Macros starting with `s' in bsd/hfs

• SEVENWORDINLINE bsd/hfs/hfs_macos_defs.h:169
• SIBLING_FORKTYPE bsd/hfs/hfs.h:368
• SIXWORDINLINE bsd/hfs/hfs_macos_defs.h:168
• STACK_UPP_TYPE bsd/hfs/hfs_macos_defs.h:786