First draft of border discovery/bridging summary text.
Got rid of spurious asp_added checks in testsuite - with single node, there cannot be (externally received) asps.
Added (yet non-working) version of bug finding code + some initial work to fix it.
Some refactoring to pass along configuration stuff elsa->pa in bit more elegant way, perhaps.
Merge branch 'master' into cedric-bugfix

Conflicts:
	elsa_pa.lua
Some simplification of code further, which fixed skv-originated updates _before_ elsa_pa is even initialized.
Fixed the prefix algorithm not running with changed local USP case.
Preliminary fix code - no test caes yet.
Added test case for it.