Improve SSL, add SSL arguments

Created by: CoolerVoid

A suggestion...

So you use Typhoeus -> he uses LibCurl... https://github.com/Arachni/arachni/blob/master/lib/arachni/http.rb#L143 why not use sslversion opts etc... ? https://github.com/typhoeus/typhoeus/blob/master/lib/typhoeus/adapters/faraday.rb#L118

I think some arguments like "arachni --cacert-load key.pem --ssl-version sslv3"

sslversion opts look here: http://curl.haxx.se/libcurl/c/CURLOPT_SSLVERSION.html

cheers