Bugfix: RPC: Add address_type named param for createmultisig

Author: luke-jr

src/rpc/misc.cpp

@@ -446,7 +446,7 @@ static const CRPCCommand commands[] =
     { "control",            "getmemoryinfo",          &getmemoryinfo,          {"mode"} },
     { "control",            "logging",                &logging,                {"include", "exclude"}},
     { "util",               "validateaddress",        &validateaddress,        {"address"} },
-    { "util",               "createmultisig",         &createmultisig,         {"nrequired","keys"} },
+    { "util",               "createmultisig",         &createmultisig,         {"nrequired","keys","address_type"} },
     { "util",               "verifymessage",          &verifymessage,          {"address","signature","message"} },
     { "util",               "signmessagewithprivkey", &signmessagewithprivkey, {"privkey","message"} },