message: Fix the name of the autostart entry
  When "Start Peercoin on system login" is selected, the created autostart entry should not be called "Bitcoin".
diff: @@ -421,7 +421,7 @@ bool SetStartOnSystemStartup(bool fAutoStart)
  // Write a bitcoin.desktop file to the autostart directory:
  optionFile << "[Desktop Entry]\n";
  optionFile << "Type=Application\n";
  - optionFile << "Name=Bitcoin\n";
  + optionFile << "Name=Peercoin\n";
  optionFile << "Exec=" << pszExePath << " -min\n";
  optionFile << "Terminal=false\n";
  optionFile << "Hidden=false\n";
  