Pass system default ssl options to websocket.create_connection
Pass system default ssl options to websocket.create_connection

Thanks to @daurnimator and @trygveaa for patches this is built on.

Fixes: #165

rawdigits/wee-slack,scharfie/wee-slack,megalithic/wee-slack,wee-slack/wee-slack,trygveaa/wee-slack