This optional flag parameter controls if confirm and
deallocate operations are run even if the address, as defined by
MapAttribute yiaddr, is missing from the accounting requests that have
Acct-Status-Type set to Start, Alive or Stop.
The default value is enabled and confirm, and deallocate are always
run.
# If Framed-IP-Address is missing from the request do nothing
MapAttribute yiaddr, Framed-IP-Address
RunIfMissing false
Tip
When IPv4 and IPv6 allocators
are chained, yiaddr is typically not set for one of the allocators. In
this case, set RunWhenMissing to off.