Update Tools.markdown
Making svrshard objects backward compatible

With bson decoding. I wanted to add a new field to SrvShard,
but I can't as is.

Sugu, I'd like to monitor the unknown fields, instead of logging them.
Let's talk about it.
Fix typo
Dropping the logging for unknown fields.
Merge branch 'master' of github.com:youtube/vitess
Fix test for unrecognized tag
querylogz