ct_test assumed it's run in the source directory and failed when built
elsewhere.  It still defaults to that, but can be told another story
with the environment variables CT_DIR and CERTS_DIR.

Test recipe updated to match.
Reviewed-by: NMatt Caswell <matt@openssl.org>
Reviewed-by: NEmilia Käsper <emilia@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>

Reviewed-by: NMatt Caswell <matt@openssl.org>

ct_test assumed it's run in the source directory and failed when built
elsewhere.  It still defaults to that, but can be told another story
with the environment variables CT_DIR and CERTS_DIR.

Test recipe updated to match.
Reviewed-by: NMatt Caswell <matt@openssl.org>

Specifies a callback that will, in the future, be used by the SSL code to
decide whether to abort a connection on Certificate Transparency grounds.
Reviewed-by: NBen Laurie <ben@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>

Reviewed-by: NBen Laurie <ben@openssl.org>
Reviewed-by: NRich Salz <rsalz@openssl.org>

Very simple test recipes easily become tedious, so they might benefit
from being made as simple as possible.  Therefore, OpenSSL::Test::Simple
is born.  It currently provides but one function, simple_test(), which
takes a minimum of two parameters (test name and program to run), with
the optional third, being the algorithm to be checked for before
running the test itself.

All recipes with that simple thing to do have been rewritten to be as
minimal as possible.
Reviewed-by: NRich Salz <rsalz@openssl.org>

Note that this required a change in constant_time_test.c, as it says
"ok", which interferes with what Test::Harness expects to see.  I had
constant_time_test.c say "success" instead.
Reviewed-by: NRich Salz <rsalz@openssl.org>

These recipes all correspond to a compiled test program.
Reviewed-by: NRich Salz <rsalz@openssl.org>

The math recipes are among the heavier, but also quite important.
For the BN test, we have previously relied on bc to verify the numbers.
Unfortunately, bc doesn't exist everywhere, making tests on some platforms
rather painful.  With the new recipe (recipes/10-test_bn.t), we rely
on perl's Math::BigInt and a homegrown simple calculator (recipes/bc.pl)
that can do enough to cover for bc.
Reviewed-by: NRich Salz <rsalz@openssl.org>