MFC r199564:   Minimize interface reinitialization by checking IFF_DRV_RUNNING   flag. This fixes unnecessary interface UP/DOWNs during getting an   IP address via DHCP.
MFC r199564:
  Minimize interface reinitialization by checking IFF_DRV_RUNNING
  flag. This fixes unnecessary interface UP/DOWNs during getting an
  IP address via DHCP.

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase