* update openssls

* missed one

* what will this do

* only do this check for 1.1.0+

* Clean up unused EC bindings.

A lot of these are really OpenSSL internals, like the EC_METHOD
business, support for custom curves which are a bad idea, and weird
non-standard serializations like taking the usual point serialization
and treating it as a single BIGNUM.

I also didn't remove things when they're arguably part of a set. E.g.
EC_POINT_add is used, but EC_POINT_dbl isn't. However, they both set at
the same abstraction level (basic point operations), so it's strange to
have one without the other.

I also kept EC_POINT_is_on_curve because, although it is not used,
OpenSSL prior to 1.1.0 doesn't perform this important check in
EC_POINT_set_affine_coordinates_GFp (though it does in some of the
functions which ultimately call it, like
EC_KEY_set_public_key_affine_coordinates, what cryptography.io actually
uses), so one should not expose the latter without the former.

* Fix build issue.

* No more FUNCS/MACROS distinction

* change the docs to not talk about MACROS since they're gone

* remove out of date comment

* Attempt to simplify the libressl checing

* SHENANGINS

* Attempted fix

* More simplification

* We always have EC

* We always have ECDH

* We always have ECDSA

* We always have EC codes

* This can go as well

* And this

* unused import

* delete the 1.0.0 support

* drop the version check

* drop the AES-CTR stuff

* Update the example

* openssl truncates for us now

* delete unused test

* unused imports

* Remove a bunch of conditional bindings for NPN

* no more 1.0.0 builders

* libressl fix

* update the docs

* remove dead branches

* oops

* this is a word, damnit

* spelling

* try removing this

* this test is not needed

* unused import