The Upholds= promise is that as long as unit A is up and Upholds=B, B will be activated if failed or inactive. But there is a hard-coded, non-configurable rate limit for this, so add a timed retry after the ratelimit has expired. Apply to BindsTo= and StopWhenUnneeded= as well. (cherry picked from commit 7223d500ac548c69e7879931e3ad8c84838f925b) (cherry picked from commit 6fc08d840718cbf20ddc2832a603c149ed92331b) (cherry picked from commit 374ef07274a26a4cac3887da86add2c1b3d4a065)
System and Service Manager
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