build-nginx: Change --group from nogroup to users

Debian doesn't have the "nobody" group, but Fedora doesn't have the
"nogroup" group. >_< I hope that every distro has at least the "users" group.

See-Also aae1317

scripts/build-nginx

@@ -46,7 +46,7 @@ configure() {
 		--http-client-body-temp-path="client_body_temp" \
 		--http-proxy-temp-path="proxy_temp" \
 		--user=nobody \
-		--group=nogroup \
+		--group=users \
 		--with-cc="${CC:-cc}" \
 		--with-cc-opt="${CFLAGS:-}" \
 		--with-ld-opt="${LDFLAGS:-}" \