LogDog: Update to archival V2.

common/errors/multierror.go

Index: common/errors/multierror.go
diff --git a/common/errors/multierror.go b/common/errors/multierror.go
index 73d9597cfd0802d286b3853170c1c33e97c76dbe..3340a96e2a9670429fccde0225339486a6422145 100644
--- a/common/errors/multierror.go
+++ b/common/errors/multierror.go
@@ -94,3 +94,25 @@ func Fix(err error) error {
 	}
 	return err
 }
+
+// Any returns true if a the filter function is true for the supplied error.
+// If the supplied error is a MultiError, Any will recurse into it.
+//
+// If err is nil, Any will return false.
+func Any(err error, fn func(error) bool) bool {
+	if err == nil {
+		return false
+	}
+
+	if fn(err) {
+		return true
+	}
+	if merr, ok := err.(MultiError); ok {
+		for _, e := range merr {
+			if Any(e, fn) {
+				return true
+			}
+		}
+	}
+	return false
+}