Fix harden ssl options

[asyncmind0]

https://erlef.github.io/security-wg/secure_coding_and_deployment_hardening/ssl

[artemeff]

thanks! but maybe we can just allow to pass entire ssl options to httpc? so all options will be on your own and you can play with them as you want, without hardening them for all users

[artemeff]

i don't accept that, don't use formatter and allow to specify ssl options entirely. like

{raven_erlang, [
    {uri, "https://app.getsentry.com"},
    {project, "1"},
    
    ...

    {ssl, <HERE_YOU_DEFINE_YOUR_CONFIG>}
]}.

because not everyone use ssl