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Stockfish 17071401 - new version!

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Stockfish, chess engine UCI

 Leader rating list JCER = 3353
🔬 Author: Joost VandeVondele

 More:
Timestamp: 1499987317 

 Move stop signal to Threads 

 Instead of having Signals in the search namespace, make the stop variables part of the Threads structure. This moves more of the shared (atomic) variables towards the thread-related structures, making their role more clear. 

 No functional change 
Closes #1149 

 ⭐⭐⭐   Stockfish 17071401 - download

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