rpcclient: add params to be parsed as JSON

There was an issue where getblockhashes wouldn't work from bitcoin-cli
as the two params would be strings instead of integers. This fixes that
issue, and will parse the first param as JSON for other addressindex
related rpc methods.

src/rpc/client.cpp

@@ -99,6 +99,14 @@ static const CRPCConvertParam vRPCConvertParams[] =
     { "prioritisetransaction", 2 },
     { "setban", 2 },
     { "setban", 3 },
+    { "getblockhashes", 0 },
+    { "getblockhashes", 1 },
+    { "getspentinfo", 0},
+    { "getaddresstxids", 0},
+    { "getaddressbalance", 0},
+    { "getaddressdeltas", 0},
+    { "getaddressutxos", 0},
+    { "getaddressmempool", 0},
     { "zcrawjoinsplit", 1 },
     { "zcrawjoinsplit", 2 },
     { "zcrawjoinsplit", 3 },