crux-00011: $SRC/str

  str/README.str                        about the "str" module
  str/str.h                             "str" interface declaration
  str/str_adjoin.c                      add a character to the end of a str
  str/str_append.c                      append a char */int string to a str
  str/str_append0.c                     append a null-terminated char * to str
  str/str_cat.c                         concatenate to strs
  str/str_copy.c                        duplicate a str
  str/str_length.c                      return the length of a str
  str/str_overlaps.c                    check if a memory region overlaps a str
  str/str_set.c                         set the contents of a str (char */int)
  str/str_set0.c                        set the contents of a str (null-terminated char *)
  str/str_set_length.c                  set the length of a str
  str/str_trim.c                        compactify a str
  str/str_view.c                        return a pointer (char *) to a str substring