Add support for OpenSSL 1.1.0

This commit is relatively major refactoring of the `openssl-sys` crate as well
as the `openssl` crate itself. The end goal here was to support OpenSSL 1.1.0,
and lots of other various tweaks happened along the way. The major new features
are:

* OpenSSL 1.1.0 is supported
* OpenSSL 0.9.8 is no longer supported (aka all OSX users by default)
* All FFI bindings are verified with the `ctest` crate (same way as the `libc`
  crate)
* CI matrixes are vastly expanded to include 32/64 of all platforms, more
  OpenSSL version coverage, as well as ARM coverage on Linux
* The `c_helpers` module is completely removed along with the `gcc` dependency.
* The `openssl-sys` build script was completely rewritten
  * Now uses `OPENSSL_DIR` to find the installation, not include/lib env vars.
  * Better error messages for mismatched versions.
  * Better error messages for failing to find OpenSSL on a platform (more can be
    done here)
  * Probing of OpenSSL build-time configuration to inform the API of the `*-sys`
    crate.
* Many Cargo features have been removed as they're now enabled by default.

As this is a breaking change to both the `openssl` and `openssl-sys` crates this
will necessitate a major version bump of both. There's still a few more API
questions remaining but let's hash that out on a PR!

Closes #452

1 files changed, 3 insertions, 2 deletions

diff --git a/openssl/src/lib.rs b/openssl/src/lib.rs
index 879681f4..66c767dc 100644
--- a/openssl/src/lib.rs
+++ b/openssl/src/lib.rs
@@ -13,6 +13,9 @@ extern crate rustc_serialize as serialize;
 #[cfg(test)]
 extern crate net2;
 
+#[cfg(test)]
+extern crate tempdir;
+
 #[doc(inline)]
 pub use ffi::init;
 
@@ -23,8 +26,6 @@ mod macros;
 pub mod asn1;
 mod bio;
 pub mod bn;
-#[cfg(feature = "c_helpers")]
-mod c_helpers;
 pub mod crypto;
 pub mod dh;
 pub mod error;