- `verify_fun` is not useful now - use `customize_check_hostname` (OTP 20+ so OK) - `partial_chain` is useless as of OTP 21.1 (wasn't there, but hackney/.. uses it)
- `verify_fun` is not useful now - use `customize_check_hostname` (OTP 20+ so OK) - `partial_chain` is useless as of OTP 21.1 (wasn't there, but hackney/.. uses it)