openssl v0.8.3

* Implement Clone for Error and ErrorStack
* Fix compilation on ARM

openssl v0.8.2

* Fix double-free issue with SslContext::add_extra_chain_cert
* Provide access to X509 not after and not before times

openssl-sys v0.7.17

openssl v0.8.1

* Fix a memory leak of X509 SANs.
* Load algorithms in initialization
* Add parsing support for PKCS rust-openssl#12 structures

openssl-sys v0.7.16

v0.8.0

* Extensive rewrites throughout
* SslStream handshakes no longer immediately complete with nonblocking sockets.
  A `MidHandshakeSslStream` is returned instead which can restart the process.
* RSA-specific functionality on PKey was removed.
* Crypter has been rewritten to support no-allocation use.
* Error types have been unified
* `openssl` no longer requires OpenSSL headers by default.
* HMAC support and some other minor features are now behind feature flags and
  do require headers.

openssl-sys v0.7.15

v0.7.14

* Fix a bug where reads report an error after a renegotiation.

* Bump user32-sys and gdi32-sys

v0.7.12

* RSA signature support
* Allow bitflags 0.7