[shepherd] branch wip-service-monitor created (now a915989)

[Ludovic Courtès]

civodul pushed a change to branch wip-service-monitor
in repository shepherd.

      at a915989  service: 'start' blocks when a service is already being 
started.

This branch includes the following new commits:

     new 29a6a37  service: Remove 'stop-delay?' and 'waiting-for-termination?'.
     new c06fa2f  service: Handle service state in a monitoring agent.
     new a915989  service: 'start' blocks when a service is already being 
started.

The 3 revisions listed above as "new" are entirely new to this
repository and will be described in separate emails.  The revisions
listed as "add" were already present in the repository and have only
been added to this reference.