crypto: disable ssl compression at build time

SSL compression was first disabled at runtime in March 2011 in commit
e83c6959 ("Disable compression with OpenSSL.") for performance reasons
and was later shown to be vulnerable to information leakage (CRIME.)
Let's stop compiling it in altogether.

This commit removes a broken CHECK from src/node_crypto.cc; broken
because sk_SSL_COMP_num() returns -1 for a NULL stack, not 0.  As a
result, node.js would abort when linked to an OPENSSL_NO_COMP build
of openssl.

PR-URL: https://github.com/nodejs/node/pull/6582


Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Fedor Indutny <fedor.indutny@gmail.com>
Reviewed-By: James M Snell <jasnell@gmail.com>