Rename dynafed_block method for clarity

Author: psgreco

src/chain.h

@@ -230,7 +230,7 @@ class CBlockIndex
         return proof.value();
     }
 
-    bool dynafed_block() const {
+    bool is_dynafed_block() const {
         if (m_trimmed) {
             return m_trimmed_dynafed_block;
         }

src/rpc/blockchain.cpp

@@ -248,7 +248,7 @@ UniValue blockheaderToJSON(const CBlockIndex* tip, const CBlockIndex* blockindex
         result.pushKV("difficulty", GetDifficulty(blockindex));
         result.pushKV("chainwork", blockindex->nChainWork.GetHex());
     } else {
-        if (!blockindex->dynafed_block()) {
+        if (!blockindex->is_dynafed_block()) {
             if (blockindex->trimmed()) {
                 result.pushKV("signblock_witness_asm", "<trimmed>");
                 result.pushKV("signblock_witness_hex", "<trimmed>");