node-tuning: sysctl-set-if-lower()
In ffpb-node-tuning/../010-arp_caches, instead of writing
if (tonumber(luci.sys.exec('sysctl net.ipv4.neigh.default.gc_thresh1'):match('%d+', 34)) or 128) < 192 then
sysctl.set('net.ipv4.neigh.default.gc_thresh1', 192)
end
I'd prefer writing
sysctl_set_if_lower('net.ipv4.neigh.default.gc_thresh1', 192)
and define that custom function sysctl_set_if_lower
once.