V10

2022/04/20 V10 :    
    > fix issue "Still rare CRC errors on upload (about 1 file on 9000 randomly) #19 ": 
      replace the preallocate buffer by an ontime allocation + use the transfer buffer as internal's file buffer (setvbuf)
    > multi transfers enhancement : double TRANSFER_BUFFER_SIZE for upload and lower the buffer used for download to the min
      +final tweaks on threads priorities to maximize the number of connections opened simultaneously on the 3 cores
    > update crcChecker.py to V2-2 :
        - fix answer "no" not taken into account when choosing to not use an report that already exists in the script's folder
        - add a try catch for permissions errors
        - fix failure when root = folder to check
    > move IOSUHAX_FSA_ChangeMode() call in the transfer thread (for uploads)
    > fix issue "Folder left after deletetion #18" 
    > fix "Crash when exiting if no connections were opened #20"