encoding link id for unnumbered interfaces

[Yakov Rekhter <yakov@juniper.net>]

Folks,

I'd like to suggest that we replace Link Local Identifier sub-TLV
and Link Remote Identifier sub-TLV (in both ISIS and OSPF) with a
single sub-TLV that would contain both Link Local Identifier and Link 
Remote Identifier.

Any objections ?

Yakov.