Use logEvent during susupcious greets

We fix a bug where fixProposedContactName didn't actually rename the
ProposedContact too.

Ideally we should use a fuzzy test for name similarity, maybe based on n-grams
or maybe a fast fuzzy spelling suggestion algorithm :
	https://github.com/sajari/fuzzy
or even JaroWinkler or Levenshtein from "github.com/antzucaro/matchr".