Regenerate all stuff.

cipd/client/cipd/internal/messages/messages.pb.go

Index: cipd/client/cipd/internal/messages/messages.pb.go
diff --git a/cipd/client/cipd/internal/messages/messages.pb.go b/cipd/client/cipd/internal/messages/messages.pb.go
index c52a4f5d64fe24b9968c8e538a66b936fd16706c..677486f64b1df231266a5b5927c9ef9a4224200d 100644
--- a/cipd/client/cipd/internal/messages/messages.pb.go
+++ b/cipd/client/cipd/internal/messages/messages.pb.go
@@ -1,6 +1,5 @@
-// Code generated by protoc-gen-go.
+// Code generated by protoc-gen-go. DO NOT EDIT.
 // source: github.com/luci/luci-go/cipd/client/cipd/internal/messages/messages.proto
-// DO NOT EDIT!
 
 /*
 Package messages is a generated protocol buffer package.
@@ -244,7 +243,7 @@ func init() {
 
 var fileDescriptor0 = []byte{
 	// 447 bytes of a gzipped FileDescriptorProto
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+	0x1f, 0x8b, 0x08, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0xff, 0x8c, 0x52, 0x4d, 0x8b, 0xd3, 0x40,
 	0x18, 0x26, 0xe9, 0xd6, 0x6d, 0xde, 0x54, 0x90, 0x39, 0x85, 0xa8, 0x6c, 0x29, 0x1e, 0x7a, 0x31,
 	0x61, 0xbb, 0x20, 0xa2, 0xa0, 0xac, 0x5f, 0xd8, 0x8b, 0x87, 0xec, 0x82, 0x78, 0x2a, 0x93, 0xe9,
 	0xdb, 0x64, 0xd8, 0xc9, 0xa4, 0x64, 0xa6, 0x0b, 0x3d, 0xfb, 0x0b, 0xfc, 0x21, 0xfe, 0x47, 0x99,