when adding duplicates in add_cert_dir.

PR: 3261
Reported by: Marian Done

(cherry picked from commit b709f8ef54b1c9ad513878ba0213aa651a9acef8)

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

This can be used to speed up SRTP with libsrtp, e.g. on TI omap/sitara based devices.

Add the RFC6962 OIDs to the objects table.

Improve CBC decrypt and CTR by ~13/16%, which adds up to ~25/33%
improvement over "pre-Silvermont" version. [Add performance table to
aesni-x86.pl].

When a chain is complete and ends in a trusted root checks are also
performed on the TA and the callback notified with ok==1. For
consistency do the same for chains where the TA is not self signed.

(other processors unaffected).

Atom Silvermont. On other CPUs one can observe 1% loss on some
algorithms.

+5% on Atom Silvermont, up to +8% improvement of legacy code.
Harmonize sha1-586.pl and aesni-sha1-x86_86.p with sha1-x86_64.pl.

Always add a dynamically loaded ENGINE to list. Otherwise it can cause
problems when multiply loaded, especially if it adds new public key methods.
For all current engines we only want a single implementation anyway.

If available rdrand is used as an additional entropy source for the
PRNG and for additional input in FIPS mode.

(and shave off cycle even from integer-only code)

(and update performance data, and fix typo)

but keep it disabled, too little gain... Add some Atom-specific
optimization.