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To support backward compatibility, since the reply choice type is different between single job deletion and multiple job deletion. (pbs_deljob vs pbs_deljobbatch)
Even reservation deletion causes to create multiple delete job requests, need refactoring on processing reply.
By having a new IFL, we could maintain the existing IFL calls (pbs_deljob) between Server->Mom for job deletion, else it would take time to implement to support these changes in Server->mom requests.
Changing the existing IFL would impact the IFL wraps and, also that welcomes more changes on hooks in server and mom. (pbs_ifl_wrap.c & pbs_tclWrap.c), since the change in reply type. For a single job, the return type is an integer that defines the status of job deletion. But in case of more number of jobs, the reply struct needs to be processed.
PTL and Perl The test framework also needs to be refactored to accommodate the IFL signature change.
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