edeliver_fork v1.4.6 Edeliver.Relup.Instructions.SuspendAppProcesses
This upgrade instruction does nothing
  but can be used in an Edeliver.Relup.Modification to indicate
  that the processes are suspended which use changed callback modules
  See also Edeliver.Relup.Instructions.ResumeAppProcesses.
  In a future step it might remove suspend instructions from
  modules which does not change exported functions and / or
  group the suspending of the processes in that way, that
  first all processes are suspended, then all code-changed
  and in the end resumed instead of performing this steps
  per module.
Link to this section Summary
Functions
Modifies the relup file
Link to this section Functions
Modifies the relup file.
  Modifies the relup file which will be used to upgrade (or downgrade) from one version to another
  by inserting, removing, or shifting appup instructions.
  See Edeliver.Relup.InsertInstruction and Edeliver.Relup.ShiftInstruction for useful helpers to
  insert / position the instructions and Edeliver.Relup.RunnableInstruction to execute custom code
  during the upgrade.
Callback implementation for Edeliver.Relup.Instruction.modify_relup/2.