chapter271, [SORA][SORA Network] We have implemented a latest log function.

We have implemented a latest log function.
Then, the String processing has also been adapted to the latest core.
SORA is gradually becoming a latest core. thank you so much!

src/util/logging.cpp
https://github.com/FromHDDtoSSD/SorachanCoin-qt/blob/develop/src/util/logging.cpp

src/util/logging.h
https://github.com/FromHDDtoSSD/SorachanCoin-qt/blob/develop/src/util/logging.h