Fix OpenExo prefix comments (#221)

Author: checho1989

src/Networks/OpenExo/OpenExo/OpenExoSetup.cs

@@ -35,8 +35,8 @@ internal class OpenExoSetup
             DefaultRPCPort = 4561,
             DefaultAPIPort = 39120,
             DefaultSignalRPort = 39620,
-            PubKeyAddress = 28,  // R https://en.bitcoin.it/wiki/List_of_address_prefixes
-            ScriptAddress = 87, // r
+            PubKeyAddress = 28,  // C https://en.bitcoin.it/wiki/List_of_address_prefixes
+            ScriptAddress = 87, // c
             SecretAddress = 156,
             GenesisTime = 1523205120,
             GenesisNonce = 842767,