lower default buffer size to 10M
lower default buffer size to 10M

Amonhuz/v2ray-core,ghmajx/v2ray-core,v2ray/v2ray-core,simpleman1984/v2ray-core,LiuWenJu/v2ray-core,LiuWenJu/v2ray-core,simpleman1984/v2ray-core,v2ray/v2ray-core,panzer13/v2ray-core,panzer13/v2ray-core,ghmajx/v2ray-core,simpleman1984/v2ray-core,Amonhuz/v2ray-core