To disable wait_for_services_timeout use -1 not 0
What does this MR do?
The documentation for wait_for_services_timeout states that setting it to 0 will disable the waiting.
However, based on the current implementation at https://gitlab.com/gitlab-org/gitlab-runner/blob/01e50620fb2e404d076eae19afde77dd192356f2/executors/docker/docker.go#L465-471 that does not appear to be the case anymore.
This behavior was changed, perhaps accidentally, during this refactor commit from 6 years ago: b46be266
In the current implementation setting it to 0 will cause it to silently fall back to the default of 30 seconds.
This change updates the document to suggest a negative number as the method to disable it, which fits with the current config check logic.
Related issues
Customer tickets (internal links):
- 2021: https://gitlab.zendesk.com/agent/tickets/244835
- 2019: https://gitlab.zendesk.com/agent/tickets/129550
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