Merge pull request #21 from cyclops8456/helium

vyatta-cfg-system: Bug #182 and #305
Bug #306: add option to enable private VLAN proxy ARP on an interface.
(aka /proc/sys/net/ipv4/conf/$intf/proxy_arp_pvlan).

Patch contributed by Shane Short.
0.20.43+vyos1+helium16
vyatta-cfg-system: formatting changes for style consistency

Update scripts/system/vyatta_update_resolv.pl to have consistent
identation levels and style throughout.
vyatta-cfg-system: revert bb71cf5b7b3a48812e28dbefba8c535f9bbf9973

Reverting commit bb71cf5b7b3a48812e28dbefba8c535f9bbf9973 as it breaks
the logic in vyatta_update_resolv.pl for removing name servers when
called by dhclient-script.  As it stands, the commit causes name server
entries to be left behind in resolv.conf when a DHCP interface is
deleted, resulting in possibly old or invalid entries remaining
indefinitely.

Bug #307 http://bugzilla.vyos.net/show_bug.cgi?id=307