[Varnish] #1256: spurious sigchlds causes ping pong to stop working

[Varnish]

#1256: spurious sigchlds causes ping pong to stop working
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 Reporter:  martin    |       Owner:
     Type:  defect    |      Status:  new
 Priority:  normal    |   Milestone:
Component:  varnishd  |     Version:  trunk
 Severity:  critical  |  Resolution:
 Keywords:            |
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Comment (by Poul-Henning Kamp <phk@…>):

 In [054fd6a6d3a79fd26d5136b0a486413bce55ff24]:
 {{{
 #!CommitTicketReference repository=""
 revision="054fd6a6d3a79fd26d5136b0a486413bce55ff24"
 Revisit the managers code to start and stop the child.

 Eliminate SIGCHLD usage, it's icky, at best, when we have other
 child processes (See #1256)

 Instead of reaping the child on SIGCHLD, we do it explicitly,
 and there is now a 10 second wait to give the child a chance to
 shut down gracefully, before we take a bat to the kneecaps.

 More work may be warranted, but I want to get some feedback on
 this bit first.

 Fixes   #1256
 }}}

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Ticket URL: <https://www.varnish-cache.org/trac/ticket/1256#comment:1>
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