add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# From http://www.networkupstools.org/source/2.7/nut-2.7.2.tar.gz.sha256
sha256  980e82918c52d364605c0703a5dcf01f74ad2ef06e3d365949e43b7d406d25a7  nut-2.7.4.tar.gz