PR#319 (reoponed version).

(cherry picked from commit 2cfbec1c)

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

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PR: #3390

PR: #3397

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

Primitive encodings shouldn't use indefinite length constructed
form.

PR#2438 (partial).

PR#2706 though patch is from PR#3366.

(cherry picked from commit 2db3ea29298bdc347f15fbfab6d5746022f05101)

Conflicts:
	ssl/t1_lib.c

(cherry picked from commit c97ec5631bb08a2171a125008d2f0d2a75687aaa)

Test EVP_CIPHER_CTX_copy in evp_test. This will catch any
problems with copying in underlying ciphers.

Internal pointers in CCM, GCM and XTS contexts should either be
NULL or set to point to the appropriate key schedule. This needs
to be adjusted when copying contexts.

We can't unfortunately print the CMAC cipher used without extending the API.

PR#2579

IN parameter.

Under the old docs, the only thing stated was "at most
EVP_PKEY_size(pkey) bytes will be written". It was kind of misleading
since it appears EVP_PKEY_size(pkey) WILL be written regardless of the
signature's buffer size.