[isc-dhcp-relay] Set custom Remote ID in Option 82

[mudrunka at spoje.net]

Hi!
Manpage of dhcrelay says:
"The client supports inclusion of a Remote ID  suboption as well, but 
this is not used by default."

But there's no support of setting Remote ID in Option 82 at dhcrelay. I 
think this would be really usefull. I need central DHCP server with 
relays in my company. We use manageable switches with Option 82 support, 
these are OK (they're including RemoteID of switch and CircuitID of port 
to DHCP requests). But in some places without these switches we need to 
use Linux with dhcrelay instead (CircuitID identifies interface as 
needed, but we also need to set RemoteID as we have multiple relays in 
our network, which means shitloads of conflicting eth0s and eth1s)

So i really need to append different RemoteIDs set by commandline 
argument on each relay...

Right now i am going to make some ugly dirty adhoc patch to dhcrelay, 
but i guess you can do it much better... Do you think it's possible to 
get this improvement in official release?

Thanks

Best regards
         Harvie