telegram_bot: verify_ssl configuration doesn't work

[Anonym-tsk]

Home Assistant release with the issue: 0.91.3

Operating environment (Hass.io/Docker/Windows/etc.): Docker

Component/platform: telegram_bot

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

automation:
- alias: Telegram /photo command
  hide_entity: true
  trigger:
    platform: event
    event_type: telegram_command
    event_data:
      command: /photo
  action:
  - service: telegram_bot.send_photo
    data_template:
      target: '{{ trigger.event.data.user_id }}'
      url: !secret hall_cam_url
      verify_ssl: False
      username: !secret xiaomi_camera_user
      password: !secret xiaomi_camera_pass
      authentication: basic
      caption: Hall camera
~

Linked issue: #22067

Traceback (if applicable):

2019-04-16 14:41:48 ERROR (SyncWorker_2) [homeassistant.components.telegram_bot] Can't load data into ByteIO: HTTPSConnectionPool(host='192.168.0.151', port=443): Max retries exceeded with url: /cgi-bin/currentpic.cgi (Caused by SSLError(SSLError("bad handshake: Error([('SSL routines', 'tls_process_server_certificate', 'certificate verify failed')])")))
2019-04-16 14:41:48 ERROR (SyncWorker_2) [homeassistant.components.telegram_bot] Can't send file with kwargs: {'url': 'https://192.168.0.151/cgi-bin/currentpic.cgi', 'verify_ssl': False, 'username': '***', 'password': '***', 'authentication': 'basic', 'caption': 'Hall camera'}

Additional information:
Changing the condition here fixes bug: https://github.com/home-assistant/home-assistant/blob/51508d69ad91c0bca1a7c326841ccf95b8f03fa7/homeassistant/components/telegram_bot/__init__.py#L197
From if verify_ssl: to if verify_ssl is not None:

@cgtobi please comment, it was your review #22069 (review)

[cgtobi]

This should be fixed. My review was wrong as stated in the followup comment. I'll submit a PR in a moment.

[cgtobi]

Thanks for reporting.