Encryption always enabled in S6-Overlay image

[steveji2021]

Describe the bug
When setting ENCRYPTED_ONLY to 0 in rustdesk-server-s6 image, hbbs in the image still forces encryption and will generate a key. Unencrypted connections are not accepted.

Describe the environment

• Install environment: Docker Compose
• Version: latest(1.1.11-1)

How to Reproduce the bug
Steps to reproduce the behavior:

1. Start rustdesk-server-s6:latest image with env variable ENCRYPTED_ONLY set to “0”.
2. Find id_ed25519.pub generated in data folder.
3. Clients are not allowed to connect without the key.

Expected behavior
Clients are able to connect without the key.