This is needed as doing only an 'exit' will only exit the
program, but any children started in the program that have
stdout/stderr still open will keep the port open until they
terminate. i.e.

    os:cmd("while true; do echo sleep 1; sleep 1; done&").

would block os:cmd forever because the while loop keeps its copies
of stdout/stderr open forever.

It could be argued that this is correct behaviour, and it is
the way it works on windows, but changing this breaks backwards
compatability for os:cmd which is not acceptable.

Conflicts:
	lib/kernel/test/gen_tcp_api_SUITE.erl
	lib/kernel/test/gen_udp_SUITE.erl

* raimo/uds-support/OTP-13643:
  Update test cases after daily builds
  Return eafnosupport when not supported
  Add AF_LOCAL test cases
  Handle 'undefined' in fdopen

Most systems alias localhost to both the ipv4 and ipv6 localhost
address, but in some cases localhost6 is used instead.

* zandra/kernel-test-cuddle:
  gen_udp_SUITE: Increase timeout to stabilize connect test
  kernel: Make sure loose test node is stopped before next test case