Add new verify options to set checks.

(backport from HEAD)

Don't verify our own responses.
(backport from HEAD)

modification to the OCSP helper purpose breaks normal OCSP verification. It is
no longer needed now we can trust partial chains.

Submitted by: Pierre Delaage

(backport from HEAD)

store instead of the default which is to return an error if we can't build
the complete chain. [backport from HEAD]

Use -1 to check all extensions in CRLs.
Always set flag for freshest CRL.

Submitted by: jean-etienne.schwartz@bull.net

In OCSP_basic_varify return an error if X509_STORE_CTX_init fails.

Submitted by: Dmitry Belyavsky <beldmit@gmail.com>

Fix DH double free if parameter generation fails.

Submitted by: Florian Weimer

Submitted by: "Florian Rüchel" <florian.ruechel@ruhr-uni-bochum.de>

Correctly handle local machine keys in the capi ENGINE.

PR: 2896

Submitted by: Adam Langley

Submitted by: Adam Langley