Fix usage of WITH_OPENSSL_BASE, WITH_OPENSSL_PORT and OPENSSL_PORT.
WITH_OPENSSL_* can't be set after bsd.port.pre.mk.
Fold all other usage into using SSL_DEFAULT == foo
PR: 210149
Submitted by: mat
Exp-run by: antoine
Sponsored by: The FreeBSD Foundation, Absolight
Differential Revision: https://reviews.freebsd.org/D6577