Select bugs

The same search fields are ORed, different fields are ANDed.

Valid severities are critical, grave, serious, important, normal, minor, wishlist, fixed

Valid tags are patch, wontfix, moreinfo, unreproducible, help, security, upstream, pending, confirmed, ipv6, lfs, d-i, l10n, newcomer, a11y, ftbfs, fixed-upstream, fixed, fixed-in-experimental, sid, experimental, potato, woody, sarge, sarge-ignore, etch, etch-ignore, lenny, lenny-ignore, squeeze, squeeze-ignore, wheezy, wheezy-ignore, jessie, jessie-ignore, stretch, stretch-ignore, buster, buster-ignore, bullseye, bullseye-ignore, bookworm, bookworm-ignore, trixie, trixie-ignore, forky, forky-ignore