HTTP callback addresses, it seems that when configured as environment variables, do not support multiple URLs, split by spaces

[Jaince]

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Describe the bug

HTTP callback addresses, it seems that when configured as environment variables, do not support multiple URLs, split by spaces, such as SRS_VHOST_HTTP_HOOKS_ON_PLAY=https://xxx/api0 https://xxx/api1

Version
v5.14.25

To Reproduce

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