vcexec: enforce old mode on oplog pipe
vcexec: enforce old mode on oplog pipe

Netsend/PerspectiveDB,Netsend/PerspectiveDB,Netsend/persdb,Netsend/PerspectiveDB,Netsend/persdb,Netsend/mastersync,Netsend/persdb,Netsend/mastersync,Netsend/mastersync