Infinite rotation files count

[reviewer301]

const size_t MaxLogFilesCount = std::numeric_limits<size_t>::max();
const size_t MaxLogFileSize = (5 * 1024 * 1024);
const std::string LoggerName("async_file_logger");
spdlog::rotating_logger_mt(LoggerName, logFile(), MaxLogFileSize, MaxLogFilesCount);

On rotation file logger check filenames from std::numeric_limits<size_t>::max() to zero.
this code in file rotating_file_sink-inl.h :

for (auto i = max_files_; i > 0; --i)
....