pfring_mod_set_bpf_filter deadlock fix (#125)
pfring_mod_set_bpf_filter deadlock fix (#125)

opencTM/PF_RING,ntop/PF_RING,ntop/PF_RING,ntop/PF_RING,opencTM/PF_RING,opencTM/PF_RING,ntop/PF_RING,ntop/PF_RING,ntop/PF_RING,opencTM/PF_RING,ntop/PF_RING