Make sure websockets respect ssl-upstream-insecure-skip-verify setting. (#494)

* Make sure websockets respect ssl-upstream-insecure-skip-verify setting.

Signed-off-by: Yaroslav Rosomakho <yaroslavros@gmail.com>

* Updated changelog for websockets taking into account ssl-upstream-insecure-skip-verify

Signed-off-by: Yaroslav Rosomakho <yaroslavros@gmail.com>

Co-authored-by: Henry Jenkins <henry@henryjenkins.name>