Merge bitcoin#14149: doc: Remove misleading checkpoints comment in CM…

…ainParams

fab5267 doxygen: Remove misleading checkpoints comment in CMainParams (MarcoFalke)

Pull request description:

  This removes the checkpoints comment because it is misleading for two reasons:

  * It shows up in the doxygen documentation of `CMainParams` https://dev.visucore.com/bitcoin/doxygen/class_c_main_params.html
  * The comment refers to "strange transactions" in a block, which are not specified further. Transactions in blocks are always consensus-valid or rejected as consensus-invalid.

  Also sort the includes with `clang-format`, as the file is touched anyway.

Tree-SHA512: b75f38dd0422b9310218307cbaa4dd5afa7579612d7dcdf781b8f25626f79c11e090dbcc83a05571f4418220c1a005f6254a9c461534d517ccecf7f1920be6be

# Conflicts:
#	src/chainparams.cpp

src/chainparams.cpp

@@ -5,8 +5,9 @@
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
 #include <chainparams.h>
-#include <consensus/merkle.h>
 
+#include <chainparamsseeds.h>
+#include <consensus/merkle.h>
 #include <tinyformat.h>
 #include <util/system.h>
 #include <util/strencodings.h>
@@ -15,8 +16,6 @@
 
 #include <assert.h>
 
-#include <chainparamsseeds.h>
-
 static CBlock CreateGenesisBlock(const char* pszTimestamp, const CScript& genesisOutputScript, uint32_t nTime, uint32_t nNonce, uint32_t nBits, int32_t nVersion, const CAmount& genesisReward)
 {
     CMutableTransaction txNew;
@@ -315,15 +314,6 @@ static Consensus::LLMQParams llmq100_67 = {
 /**
  * Main network
  */
-/**
- * What makes a good checkpoint block?
- * + Is surrounded by blocks with reasonable timestamps
- *   (no blocks before with a timestamp after, none after with
- *    timestamp before)
- * + Contains no strange transactions
- */
-
-
 class CMainParams : public CChainParams {
 public:
     CMainParams() {