Move getinfo RPC method to askwallet list.

The getinfo RPC method requires access to information only available in
the wallet.  Therefore, it has been moved to the list of methods which
return an error information the caller to send the request to the wallet
instead.

rpcserver.go

@@ -94,6 +94,7 @@ var rpcAskWallet = map[string]bool{
 	"getaddressesbyaccount":  true,
 	"getbalance":             true,
 	"getblocktemplate":       true,
+	"getinfo":                true,
 	"getnewaddress":          true,
 	"getrawchangeaddress":    true,
 	"getreceivedbyaccount":   true,
@@ -131,7 +132,6 @@ var rpcAskWallet = map[string]bool{
 
 // Commands that are temporarily unimplemented.
 var rpcUnimplemented = map[string]bool{
-	"getinfo":          true,
 	"getmininginfo":    true,
 	"getnettotals":     true,
 	"getnetworkhashps": true,