Forces KRT rescan on syncer startup with multi syncer config.

Thanks to  Sergey Popovich for the patch.
Merge pull request #1 from Oryon/master

[DEBUG] Keep latest source address as neighbor's address
Implements 'allow local as' option.

Similar to allowas-in option on other routers.
Accepts a change of OSPFv3 neighbor's IP address.

Thanks to Pierre Pfister for the patch.
Merge remote-tracking branch 'bird/master'

Conflicts:
	proto/ospf/hello.c
Ohops, merge damage.
Added router id # also to debug messages - this way we can track them well in OSPFv3.
Added router id to inactivity timer notification.
Passing along calcrt flag all the way to Lua code (and beyond there to PA code). This allows for correct caching of routing results.
Disabled IPv6 primary address changes from flapping the interface. There is simply no need (and they break homenet stuff fairly badly).