add check to libsodium version in configure.ac
add check to libsodium version in configure.ac

BTCGPU/BTCGPU,h4x3rotab/BTCGPU,shelvenzhou/BTCGPU,StarbuckBG/BTCGPU,BTCGPU/BTCGPU,shelvenzhou/BTCGPU,h4x3rotab/BTCGPU,StarbuckBG/BTCGPU,h4x3rotab/BTCGPU,shelvenzhou/BTCGPU,shelvenzhou/BTCGPU,StarbuckBG/BTCGPU,BTCGPU/BTCGPU,BTCGPU/BTCGPU,shelvenzhou/BTCGPU,h4x3rotab/BTCGPU,shelvenzhou/BTCGPU,BTCGPU/BTCGPU,StarbuckBG/BTCGPU,h4x3rotab/BTCGPU,StarbuckBG/BTCGPU,BTCGPU/BTCGPU,h4x3rotab/BTCGPU,StarbuckBG/BTCGPU