[Talk-br] BR-116 split and cleanup

[Paul Norman]

In the course of redacting some Tracksource data from the database, I 
came across a relation for BR-116 which had about 2400 members and was 
version 1000. A relation like this is a problem for various practical 
reasons such as edit conflicts, getting history, and generally being 
impossible to work with.

I've split it up into four relations with a super-relation 
(http://www.openstreetmap.org/relation/4551470), the standard method for 
dealing with very long highways.

The parts are in the north (osm.org/relation/4551466), around Rio de 
Janerio (osm.org/relation/4551467), around Sao Paulo 
(osm.org/relation/4551468) and in the south (osm.org/relation/4551469).

The tracksource redaction is temporarily paused, but should now be much 
faster as it doesn't have to work with that mega-relation.

Paul Norman
For the OSMF Data Working Group