For some reason, they are in the NDK sources but
they are not available in the tests. I don't know what
Android does here, but nothing that makes sense.

I'd rather avoid the duplication, this is discussed in #707.

Bump to version 0.2.29

Rationale for release: My changes in https://github.com/nix-rust/nix/pull/688 are blocked on getting a libc release out with the missing constant  present.

Add IPV6_JOIN_GROUP and IPV6_LEAVE_GROUP to uclibc

Hello! Just some minor fixes so that net2 compiles correctly on uclibc

Add EVFILT_EXCEPT constant

add SO_RCVBUFFORCE for s390x

Add missing SO_TIMESTAMP constant for OpenBSD like OSes

Added to mod.rs as both [OpenBSD](https://github.com/openbsd/src/blob/e35050970e3e2b822e383a5e844e4c4402eebccc/sys/sys/socket.h#L97) and [Bitrig](https://github.com/bitrig/bitrig/blob/a15267d8249fe8d329eb34048605c59a394a02ac/sys/sys/socket.h#L100) have it.

Required for https://github.com/nix-rust/nix/pull/688

change type of INADDR constants to in_addr_t

These should be `in_addr_t` (u32) instead of `c_int`

This is a breaking change but it is just breaking newlib platforms for now.

@alexcrichton Do you prefer that I split the definition in submodules, to keep `c_int` in newlib and update the others ?

Add CI badges

define INADDR_* constants in unix platforms

PTHREAD_PROCESS_PRIVATE needs to be a 16-bit type on Solaris

Compiles of libc on Solaris fail because we're trying to assign a 32-bit constant to a 16-bit struct member.

Bump version to 0.2.28

This contains PR #686.

unix: add fexecve()

Add missing fexecve() - execute program specified via file descriptor.

Reference: http://pubs.opengroup.org/onlinepubs/9699919799/functions/fexecve.html

Add offsets in user_regs_struct from sys/reg.h

Add missing fexecve() - execute program specified via file descriptor.

Reference: http://pubs.opengroup.org/onlinepubs/9699919799/functions/fexecve.html

Update crate version

Disable revocation checking temporarily on AppVeyor

Add signalfd and related to android

Add missing flags to Linux and Android