xmrig/xmrig-proxy v2.6.3 on GitHub

Added support for new cryptonight-heavy variant xhv (cn-heavy/xhv) for upcoming Haven Protocol fork.
Added support for new cryptonight variant msr (cn/msr) also known as cryptonight-fast for upcoming Masari fork.
Changed behavior for automatic variant to allow pool override algorithm.
Fixed --api-ipv6 option.
#629 Fixed file logging with non-seekable files.
#672 Reverted back cryptonight-light and exit if no valid algorithm specified.