add ansible template comment to template files

roles/arch-boxes/templates/arch-boxes.service.j2

roles/arch-boxes/templates/arch-boxes.timer.j2

roles/arch-boxes/templates/sudoers.d.j2

roles/arch32_mirror/templates/nginx.d.conf.j2

roles/archive/templates/archive.conf.j2

roles/archive/templates/nginx.d.conf.j2

roles/archweb/templates/archweb-memcached.service.j2

roles/archweb/templates/archweb-mirrorcheck.service.j2

roles/archweb/templates/archweb-mirrorcheck.timer.j2

roles/archweb/templates/archweb-mirrorresolv.service.j2

roles/archweb/templates/archweb-mirrorresolv.timer.j2

roles/archweb/templates/archweb-pgp_import-pacman-hook.j2

roles/archweb/templates/archweb-pgp_import.service.j2

roles/archweb/templates/archweb-populate_signoffs.service.j2

roles/archweb/templates/archweb-populate_signoffs.timer.j2

roles/archweb/templates/archweb-reporead.service.j2

roles/archweb/templates/archweb-rsync_iso.service.j2

roles/archweb/templates/archweb-rsync_iso.timer.j2

roles/archweb/templates/archweb.ini.j2

roles/archweb/templates/local_settings.py.j2