Windows.

we can compare if non-NULL elsewhere

system thinks free(NULL) is badness)

  the resolv.conf file, the first entry encountered is processed and used as
  the search list. According to the manual pages for both Linux, Solaris and
  Tru64, the last entry of either a domain or a search field is used.

cc-1506 cc: REMARK File = ../../curl/ares/ares__read_line.c, Line = 46
There is an implicit conversion from "unsigned long" to "int"; rounding, sign
extension, or loss of accuracy may result.

if (!fgets(*buf + offset, *bufsize - offset, fp))