Based on an original patch by Neitrino Photonov <neitrinoph@gmail.com>

PR#3439

(cherry picked from commit 66816c53)

(cherry picked from commit 1b0fe79f)

(cherry picked from commit d11c70b2)

PR: #3424,#3423,#3422
(cherry picked from commit 021e5043)

(cherry picked from commit c4f8efab)

(cherry picked from commit 07b635cc)

PR#2985
(cherry picked from commit 9d23f422)

Based on feedback from Jeffrey Walton.

(cherry picked from commit b73ac027)

Reduces number of silly casts in OpenSSL code and likely most
applications.  Consistent with (char *) for "peername" value from
X509_check_host() and X509_VERIFY_PARAM_get0_peername().

(cherry picked from commit 297c67fc)

Pass address of X509_VERIFY_PARAM_ID peername to X509_check_host().
Document modified interface.

(cherry picked from commit ced3d915)

Declaration, memory management, accessor and documentation.

(cherry picked from commit 6e661d45)

(cherry picked from commit eef1827f)

(cherry picked from commit 90b70a6a)

Implemented as STACK_OF(OPENSSL_STRING).

(cherry picked from commit 8abffa4a)

(cherry picked from commit 66d884f0)

(cherry picked from commit ee724df7)

(cherry picked from commit cba3f1c7)

(cherry picked from commit a44f219c)

(cherry picked from commit a23a6e85)

PR#2277
(cherry picked from commit 733a6c882e92f8221bd03a51643bb47f5f81bb81)

(cherry picked from commit 07255f0a76d9d349d915e14f969b9ff2ee0d1953)

PR: #3431
(cherry picked from commit 7eb9680a)

(cherry picked from commit 0e7a32b5)

(cherry picked from commit 375a64e3)

PR#3418.
(cherry picked from commit fdea4fff)

PR#319 (reoponed version).
(cherry picked from commit 7f6e9578)

(cherry picked from commit 55707a36)

Remove RFC5878 code. It is no longer needed for CT and has numerous bugs.

(cherry picked from commit f1112985)

PR: #3390
(cherry picked from commit aab3560b)

PR: #3397
(cherry picked from commit eca441b2)

ERR_get_error(3) references the non-existent
ERR_get_last_error_line_data instead of the one that does exist,
ERR_peek_last_error_line_data.

PR#3283
(cherry picked from commit 5cc99c6c)

(cherry picked from commit 7cb472bd)

Primitive encodings shouldn't use indefinite length constructed
form.

PR#2438 (partial).
(cherry picked from commit 398e99fe)

(cherry picked from commit 387b844f)

(cherry picked from commit 2db3ea29)

Conflicts:
	ssl/ssl_locl.h
	ssl/t1_lib.c

(cherry picked from commit 29be3f64)