audio/festvox-cmu_us_slt_arctic, games/flightgear-terragear, graphics/zathura-cb, graphics/zathura-pdf-poppler, graphics/zathura-ps, math/nfft, net/py-mpi4py, science/aircraft-datcom, x11-themes/gnome-icons-luv: reset MAINTAINER

Submitted by: Michael Danilov <mike.d.ft402@gmail.com> (maintainer)