Vxworks support.

- clear ctx->num in EVP_CipherInit_ex
- adapt e_eas.c changes from http://cvs.openssl.org/chngview?cn=19816
  for eng_aesni.c

Submitted by: Emilia Kasper

Submitted by: Bob Buckholz <bbuckholz@google.com>

Submitted by: Emilia Kasper

all files instead of sanity checks.

Now enable v2 by default and require a --disable-v2 option to run the
old v1 tests.