init.cpp: log fee estimates filename on error

- small changes to Shutdown(), buffer __func__, which is now used in
  all LogPrintf() calls and format for better readability
- order using namespace alpabetically

src/init.cpp

@@ -38,8 +38,8 @@
 #include <boost/interprocess/sync/file_lock.hpp>
 #include <openssl/crypto.h>
 
-using namespace std;
 using namespace boost;
+using namespace std;
 
 #ifdef ENABLE_WALLET
 CWallet* pwalletMain;
@@ -109,10 +109,11 @@ static CCoinsViewDB *pcoinsdbview;
 
 void Shutdown()
 {
-    LogPrintf("Shutdown : In progress...\n");
+    LogPrintf("%s: In progress...\n", __func__);
     static CCriticalSection cs_Shutdown;
     TRY_LOCK(cs_Shutdown, lockShutdown);
-    if (!lockShutdown) return;
+    if (!lockShutdown)
+        return;
 
     RenameThread("bitcoin-shutoff");
     mempool.AddTransactionsUpdated(1);
@@ -130,7 +131,7 @@ void Shutdown()
     if (est_fileout)
         mempool.WriteFeeEstimates(est_fileout);
     else
-        LogPrintf("failed to write fee estimates");
+        LogPrintf("%s: Failed to write fee estimates to %s\n", __func__, est_path.string());
 
     {
         LOCK(cs_main);
@@ -142,9 +143,12 @@ void Shutdown()
             pblocktree->Flush();
         if (pcoinsTip)
             pcoinsTip->Flush();
-        delete pcoinsTip; pcoinsTip = NULL;
+        delete pcoinsTip;
-        delete pcoinsdbview; pcoinsdbview = NULL;
+        pcoinsTip = NULL;
-        delete pblocktree; pblocktree = NULL;
+        delete pcoinsdbview;
+        pcoinsdbview = NULL;
+        delete pblocktree;
+        pblocktree = NULL;
     }
 #ifdef ENABLE_WALLET
     if (pwalletMain)
@@ -156,7 +160,7 @@ void Shutdown()
     if (pwalletMain)
         delete pwalletMain;
 #endif
-    LogPrintf("Shutdown : done\n");
+    LogPrintf("%s: done\n", __func__);
 }
 
 //
@@ -315,6 +319,7 @@ std::string HelpMessage(HelpMessageMode mode)
 
     strUsage += "\n" + _("Node relay options:") + "\n";
     strUsage += "  -datacarrier           " + _("Relay and mine data carrier transactions (default: 1)") + "\n";
+
     strUsage += "\n" + _("Block creation options:") + "\n";
     strUsage += "  -blockminsize=<n>      " + _("Set minimum block size in bytes (default: 0)") + "\n";
     strUsage += "  -blockmaxsize=<n>      " + strprintf(_("Set maximum block size in bytes (default: %d)"), DEFAULT_BLOCK_MAX_SIZE) + "\n";
@@ -564,9 +569,9 @@ bool AppInit2(boost::thread_group& threadGroup)
     if (GetBoolArg("-nodebug", false) || find(categories.begin(), categories.end(), string("0")) != categories.end())
         fDebug = false;
 
-    // Check for -debugnet (deprecated)
+    // Check for -debugnet
     if (GetBoolArg("-debugnet", false))
-        InitWarning(_("Warning: Deprecated argument -debugnet ignored, use -debug=net"));
+        InitWarning(_("Warning: Unsupported argument -debugnet ignored, use -debug=net."));
     // Check for -socks - as this is a privacy risk to continue, exit here
     if (mapArgs.count("-socks"))
         return InitError(_("Error: Unsupported argument -socks found. Setting SOCKS version isn't possible anymore, only SOCKS5 proxies are supported."));
@@ -994,6 +999,7 @@ bool AppInit2(boost::thread_group& threadGroup)
 
     boost::filesystem::path est_path = GetDataDir() / FEE_ESTIMATES_FILENAME;
     CAutoFile est_filein = CAutoFile(fopen(est_path.string().c_str(), "rb"), SER_DISK, CLIENT_VERSION);
+    // Allowed to fail as this file IS missing on first startup.
     if (est_filein)
         mempool.ReadFeeEstimates(est_filein);