Move the stale vlan release up above the nfree section in doswapin(modify) so that new test in nfree for vlan membership does not trigger.
Move the stale vlan release up above the nfree section in
doswapin(modify) so that new test in nfree for vlan membership does
not trigger.

nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome,nmc-probe/emulab-nome