add gpio

hc

2023-12-04 f33f61bdb7ca6d5ebe7a78f9d8694b91360279ac

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# Locally computed:
sha256  79b4c54cdbaf02c1a9a691d9948fcb1a77a1591a813e904283a8b614b757e850  fetchmail-6.3.26.tar.xz