When detecting OpenSSL, look for 1.0.1, and in homebrew location
Previously we would detect the system openssl on OSX, and then fail to use it, since we required Open 1.0.1 or later. That's silly! Instead of looking for RAND_add(), look for TLSv1_1_method(): it was introduced in 1.0.1, and is also present in LibreSSL. Also, add the hombebrew path to our search path here. Fixes bug 23602; bugfix on 0.2.7.2-alpha.