Add setexcessiveblock to vRPCConvertParams

Summary: As per title.

Test Plan:
  ninja all check-all

Reviewers: #bitcoin_abc, jasonbcox

Reviewed By: #bitcoin_abc, jasonbcox

Differential Revision: https://reviews.bitcoinabc.org/D5661

src/rpc/abc.cpp

@@ -43,16 +43,15 @@ static UniValue setexcessiveblock(Config &config,
             HelpExampleRpc("setexcessiveblock", ""));
     }
 
-    int64_t ebs = 0;
-    if (request.params[0].isNum()) {
-        ebs = request.params[0].get_int64();
-    } else if (!ParseInt64(request.params[0].get_str(), &ebs)) {
+    if (!request.params[0].isNum()) {
         throw JSONRPCError(
             RPC_INVALID_PARAMETER,
             std::string(
                 "Invalid parameter, excessiveblock must be an integer"));
     }
 
+    int64_t ebs = request.params[0].get_int64();
+
     // Do not allow maxBlockSize to be set below historic 1MB limit
     if (ebs <= int64_t(LEGACY_MAX_BLOCK_SIZE)) {
         throw JSONRPCError(

src/rpc/client.cpp

@@ -152,6 +152,8 @@ static const CRPCConvertParam vRPCConvertParams[] = {
     {"createwallet", 2, "blank"},
     {"getnodeaddresses", 0, "count"},
     {"stop", 0, "wait"},
+    // ABC specific RPC
+    {"setexcessiveblock", 0, "blockSize"},
 };
 
 class CRPCConvertTable {