Handle M_MAX_DELAY_EXCEEDED errors

[AndrewFerr]

Use a lower delay time if the server rejects a delay as too long.

Signed-off-by: Andrew Ferrazzutti andrewf@element.io

Checklist

• Tests written for new code (and old code if feasible).
• New or updated public/exported symbols have accurate TSDoc documentation.
• Linter and other CI checks pass.
• Sign-off given on the changes (see CONTRIBUTING.md).