Old accounts (older than either 500 days or two years, not sure which) were recently purged. [1] libnss-mysql was last updated in May 2012, which would probably explain why the submitter, maintainer and packager is listed as "None."
I'll leave it up to the TUs to confirm this hypothesis and let you know whether there's still any way to get that account info. — Jeremy "Ichimonji10" Audet [1a] https://mailman.archlinux.org/pipermail/aur-general/2014-January/027030.html [1b] https://mailman.archlinux.org/pipermail/aur-general/2014-February/027039.html
