file-type: add support for doors and other less-common file types Problem with S_ISDOOR reported by Rich Burridge. * lib/file-type.c (file_type): Do S_ISLNK early too. Do S_TYPEIS* macros before the rest. Add S_ISCTG, S_ISDOOR, S_ISMPB, S_ISMPC, S_ISMPX, S_ISNAM, S_ISNWK, S_ISOFD, S_ISOFL, S_ISPORT, S_ISWHT.