* posix/tst-mmap-offset.c: Include stdint.h. * resolv/tst-ns_name_compress.c: Include string.h. * resolv/tst-resolv-edns.c: Include resolv.h.
EDNS is disabled by default (so there is interoperability issue), and the fallback code is problematic because it prevents an application from obtaining DNSSEC data after a FORMERR response.
This hardens the stub resolver against fragmentation-based attacks.