[Bro-Dev] #361: Copy Bro binary only when in NFS mode

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#361: Copy Bro binary only when in NFS mode
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 Reporter:  robin       |      Owner:  robin
     Type:  Task        |     Status:  new
 Priority:  Normal      |  Milestone:  Bro1.6
Component:  BroControl  |    Version:  git/master
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 Currently, BroControl copies the bro binary to all clients' spool
 directory, and then runs it from there. While that avoids problems
 when the Bro installation is on NFS, it can cause trouble in other
 contexts (like capabilities set for the binary to be lost; and I
 think we had more in the past I don't recall right now).

 So, the solution seems to be to avoid the copy unless in NFS mode.

 We could also revisit whether we want to keep supporting runnign
 from NFS at all, but generall I'd like to do so.

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Ticket URL: <http://tracker.icir.org/bro/ticket/361>
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