Split key_io (address/key encodings) off from base58

src/rpc/mining.cpp

@@ -3,7 +3,6 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <base58.h>
 #include <amount.h>
 #include <chain.h>
 #include <chainparams.h>
@@ -13,6 +12,7 @@
 #include <core_io.h>
 #include <init.h>
 #include <validation.h>
+#include <key_io.h>
 #include <miner.h>
 #include <net.h>
 #include <policy/fees.h>