doc/rft: fix up proto

Documentation/rfc/v3api.proto

@@ -17,7 +17,7 @@ service etcd {
 
   // Tnx processes all the requests in one transaction.
   // A tnx request increases the index of the store,
-  // and generates one event in the event history.
+  // and generates events with the same index in the event history.
   rpc Tnx(TnxRequest) returns (TnxResponse) {}
 
   // Watch watches the events happening or happened in etcd. Both input and output
@@ -100,20 +100,18 @@ message DeleteRangeResponse {
 }
 
 message RequestUnion {
-  oneof value {
+  oneof request {
     RangeRequest request_range = 1;
     PutRequest request_put = 2;
-    DeleteRequest request_delete = 3;
-    DeleteRangeRequest request_delete_range = 4;
+    DeleteRangeRequest request_delete_range = 3;
   }
 }
 
 message ResponseUnion {
-  oneof value {
+  oneof response {
     RangeResponse reponse_range = 1;
     PutResponse response_put = 2;
-    DeleteResponse response_delete = 3;
-    DeleteRangeResponse response_delete_range = 4;
+    DeleteRangeResponse response_delete_range = 3;
   }
 }
 
@@ -126,15 +124,15 @@ message Compare {
   optional CompareType type = 1;
   // key path
   optional bytes key = 2;
-  oneof {
+  oneof target {
     // version of the given key
-    int64 version = 1;
+    int64 version = 3;
     // create index of the given key
-    int64 create_index = 2;
+    int64 create_index = 4;
     // last modified index of the given key
-    int64 mod_index = 3;
+    int64 mod_index = 5;
     // value of the given key
-    bytes value = 4;
+    bytes value = 6;
   }
 }
 
@@ -174,7 +172,7 @@ message TnxResponse {
 message KeyValue {
   optional bytes key = 1;
   // mod_index is the last modified index of the key.
-  optional int64 create_index = 2
+  optional int64 create_index = 2;
   optional int64 mod_index = 3;
   // version is the version of the key. A deletion resets
   // the version to zero and any modification of the key