Submitted by: Roumen Petrov

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)

(cherry picked from commit 3eddd1706a30cdf3dc9278692d8ee9038eac8a0d)

PR: 3201

(cherry picked from commit 3678161d717d0f46c5b5b052a6d6a33438b1df00)

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)

Add the RFC6962 OIDs to the objects table.

(cherry picked from commit a2317c3ffde3f1f73bd7fa3f08e420fb09043905)

The contract for custom extension callbacks has changed - all custom extension callbacks are triggered

Whitespace fixes

If multiple TLS extensions are expected but not received, the TLS extension and supplemental data 'generate' callbacks are the only chance for the receive-side to trigger a specific TLS alert during the handshake.

Removed logic which no-op'd TLS extension generate callbacks (as the generate callbacks need to always be called in order to trigger alerts), and updated the serverinfo-specific custom TLS extension callbacks to track which custom TLS extensions were received by the client, where no-ops for 'generate' callbacks are appropriate.

If an application calls the macro SSL_CTX_get_extra_chain_certs
return either the old "shared" extra certificates or those associated
with the current certificate.

This means applications which call SSL_CTX_use_certificate_chain_file
and retrieve the additional chain using SSL_CTX_get_extra_chain_certs
will still work. An application which only wants to check the shared
extra certificates can call the new macro
SSL_CTX_get_extra_chain_certs_only

This allows to process multiple fragmets of maximum fragment size,
as opposite to chopping maximum-sized fragments to multiple smaller
ones. This approach relies on dynamic allocation of larger buffers,
which we trade for performance improvement, for several *times* in
some situations.

If application has more data than maximum fragment, hold to buffer
for whole write, as opposite to per-fragment strategy.

New ctrl sets current certificate based on certain criteria. Currently
two options: set the first valid certificate as current and set the
next valid certificate as current. Using these an application can
iterate over all certificates in an SSL_CTX or SSL structure.

PR#3244
(cherry picked from commit 9614d2c676ffe74ce0c919d9e5c0d622a011cbed)

Partial fix for PR#3183.

PR#3178

change documentation and comments to indicate that we prefer the
standard "DHE" naming scheme everywhere over the older "EDH"

Replace the full ciphersuites with "EDH-" in their labels with "DHE-"
so that all DHE ciphersuites are referred to in the same way.

Leave backward-compatible aliases for the ciphersuites in question so
that configurations which specify these explicitly will continue
working.

This change normalizes the SSL_CK_DHE_ #defines to use the common term
"DHE", while permitting older code that uses the more uncommon "EDH"
constants to compile properly.

DHE is the standard term used by the RFCs and by other TLS
implementations.  It's useful to have the internal variables use the
standard terminology.

This patch leaves a synonym SSL_kEDH in place, though, so that older
code can still be built against it, since that has been the
traditional API.  SSL_kEDH should probably be deprecated at some
point, though.

other parts of packet tracing emit the standard "DHE" label instead of
"edh".  This change brings the output of ssl_print_client_keyex() and
ssl_print_server_keyex() into accordance with the standard term.