CI still runs version 10

Available since FreeBSD 9.0, this API allows using local descriptors
instead of global PIDs. It works in Capsicum sandboxes.

add DT_UNKNOWN

The `d_type` field of `struct dirent` can be `DT_UNKNOWN` if a
filesystem doesn't support returning the file type in directory entries.
Linux's readdir(3) man page, for example, says: "Currently, only some
filesystems [...] have full support for returning the file type in
d_type. All applications must properly handle a return of DT_UNKNOWN."

The `d_type` field of `struct dirent` can be `DT_UNKNOWN` if a
filesystem doesn't support returning the file type in directory entries.
Linux's readdir(3) man page, for example, says: "Currently, only some
filesystems [...] have full support for returning the file type in
d_type. All applications must properly handle a return of DT_UNKNOWN."

Bsd domainname

Closes #868 .

Fix containers using ubuntu 17.04

Apparently 17.04 has gone away? Or updates are failing now?

Looks like ubuntu 17.04 is broken now and it fails to link on 17.10 and 18.04.
It seems to work on stretch though!

Apparently 17.04 is broken now?

Closes #868 .

Add sockaddr_ctl on Mac

Add killpg

added EPOLL(5)  for Illumos (Solaris fork)

EPOLL(5)  is being used in crates like mio and iovec , this change allows those crates and other that depends on EPOLL(5)  to be built in illumos systems.

Difftime

Once merged, can you update the crate too please?

feat(linux): add mntent struct and related functions

Useful when playing around with mounting points, sadly not a common interface. :(

Useful when playing around with mounting points, sadly not a common
interface

Minor fixes for CloudABI ARM support

In the initial set of fixes for CloudABI, it looks like support for 32-bit ARM was left out, even though it is supported for C/C++. While there, fix up `c_char` for ARM64, which currently has the wrong sign.

On ARM64, it is supposed to be unsigned char:

  $ aarch64-unknown-cloudabi-cc -dM -E - < /dev/null | grep __CHAR_UNSIGNED__
  #define __CHAR_UNSIGNED__ 1

Add time_t for CloudABI.

Even though this data type is not used by libstd in any platform
independent code, one of the unit tests in src/libstd/time/mod.rs refers
to it. Instead of making that unit test more complicated, simply add
time_t, matching the type used by the C library.

android: add statvfs flags (ST_*)

Signed-off-by: Igor Gnatenko <i.gnatenko.brain@gmail.com>