Assign opt82_ses=ses if shared=0

introduced new config option:
[ipoe]
vendor=Name

this affects to all attributes specified in attr-xxx options

new config option:
[common]
max-sessions=N

If set then accel-pppd stops reply to new connection requests if total number of sessions (active and starting) is reached specified limit.

This reverts commit e3fc927e.

new config option:
[common]
max-sessions=N

If set then accel-pppd stops reply to new connection requests if total number of sessions (active and starting) is reached specified limit.

Included bitop library http://bitop.luajit.org/index.html
It may be used to extract vlan components in username function:
function username(ses)
  vid=ses:vlan()
  svid=bit.rshift(vid,16)
  cvid=bit.band(vid,0xffff)
  ...
end

For this need to send 2 attributes: L4-Redirect=1,L4-Redirect-Ipset=new-set

ipoe: assign point-to-point addresses to non-shared physical interface (prevents route cleaning by interface renaming)

ipoe,pppoe,vlan_mon: deleted conditions to simultaneous start ipoe and pppoe on same interfaces (started by vlan_mon)

If start=auto is specified then accel-pppd automatically starts session with username = interface name on shared=0 interfaces.
Use it with conjuction vlan_mon. So any packet may start session.

local-net is used to filter incomming packets which may start UP session