Check session_cert is not NULL before dereferencing it.
(cherry picked from commit 8011cd56)

PR#3286

Submitted by: Ard Biesheuvel.

Add certificates if -nocerts and -certfile specified when signing
in smime application. This can be used this to specify the
order certificates appear in the PKCS#7 structure: some broken
applications require a certain ordering.

PR#3316

PR#3302

Delays the queue insertion until after the ssl3_setup_buffers() call due to use-after-free bug. PR#3362

Add TLS padding extension to SSL_OP_ALL so it is used with other
"bugs" options and can be turned off.

This replaces SSL_OP_SSLREF2_REUSE_CERT_TYPE_BUG which is an ancient
option referring to SSLv2 and SSLREF.

PR#3336

armcap.c is shared between 32- and 64-bit builds and features link-time
detection of getauxval.

Submitted by: Ard Biesheuvel.

Closes #116.

Generates a number coprime to 2, 3, 5, 7, 11.

Speed:
Trial div (add) : trial div (retry) : coprime
1 : 0.42 : 0.84

~2% speed improvement on trial division.

Possibly some reduction in bias, but no speed gains.