setup.sh now clones/builds the miner from git.dragonx.is/DragonX/drg-xmrig
(was dragonx/xmrig-hac), and the prebuilt staging dir is renamed
prebuilt-binaries/xmrig-hac -> prebuilt-binaries/drg-xmrig across build.sh, the
legacy Windows build script, .gitignore and README.
Also aligns setup.sh's section-8 directory list with section 7 (it previously
used a bare "xmrig" token, creating a stray empty prebuilt-binaries/xmrig/),
and updates the xmrig_manager.cpp header comment.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
