Although the memory allocated by compression methods is fixed and
cannot grow over time it can cause warnings in some leak checking
tools. The function SSL_COMP_free_compression_methods() will free
and zero the list of supported compression methods. This should
*only* be called in a single threaded context when an application
is shutting down to avoid interfering with existing contexts
attempting to look up compression methods.
(cherry picked from commit 976c58302b13d085edb3ab822f5eac4b2f1bff95)

PR: 3271

(cherry picked from commit 3eddd1706a30cdf3dc9278692d8ee9038eac8a0d)

PR: 3201

(cherry picked from commit 3678161d717d0f46c5b5b052a6d6a33438b1df00)

Not all platforms define BN_ULLONG. Define SCTS_TIMESTAMP as a type
which should work on all platforms.
(cherry picked from commit 6634416732b94627eba1c47de3c3a6321a5458f0)

Windows 8 SDKs complain that GetVersion() is deprecated.

We only use GetVersion like this:

	(GetVersion() < 0x80000000)

which checks if the Windows version is NT based. Use a macro check_winnt()
which uses GetVersion() on older SDK versions and true otherwise.

Allegedly formwarding to NUL: sometimes creates NUL file in file
system.

PR: 3250

PR: 3251
Suggested by: Thorsten Schning

when adding duplicates in add_cert_dir.

PR: 3261
Reported by: Marian Done

When setting the current certificate check that it has a corresponding
private key.

New flags to build certificate chains. The can be used to rearrange
the chain so all an application needs to do is add all certificates
in arbitrary order and then build the chain to check and correct them.

Add verify error code when building chain.

Update docs.

(cherry picked from commit b709f8ef54b1c9ad513878ba0213aa651a9acef8)

Add the extension parser in the s_client, ocsp and x509 apps.

The flag SSL_OP_MSIE_SSLV2_RSA_PADDING hasn't done anything since OpenSSL
0.9.7h but deleting it will break source compatibility with any software
that references it. Restore it but #define to zero.
(cherry picked from commit b17d6b8d1d49fa4732deff17cfd1833616af0d9c)