Origin for each line in rpc_umntall.init.mk from check-in 7a1e7f4a58:

7a1e7f4a58 2019-10-21    1: rpc_umntall: mountlate NETWORK rpcbind
7a1e7f4a58 2019-10-21    2: .if empty(RPC_UMNTALL_ENABLE:tl:Mno)
7a1e7f4a58 2019-10-21    3: 	echo "MRC:$@> Sending RPC unmount notifications."; \
7a1e7f4a58 2019-10-21    4: 	test -f /var/db/mounttab || true && \
7a1e7f4a58 2019-10-21    5: 	  rpc.umntall -k &
7a1e7f4a58 2019-10-21    6: .endif