sql/dml: Use rwLocker in BuilderBase to prevent go vet false positive
sql/dml: Use rwLocker in BuilderBase to prevent go vet false positive

go vet reports a false positive when copying the sync.RWMutex, which is ok
but in this case sync.RWMutex does not get copied, it gets created new.
So the rwLocker solves this by a hack :-(

corestoreio/csfw,corestoreio/csfw