qosify: add package for simple qos based on ebpf+cake

qosify is simple daemon for setting up and managing CAKE along with a custom
eBPF based classifier that sets DSCP fields of packets.

It is configured via UCI and it supports the following features:
- simple TCP/UDP port based mapping
- IP address based mapping
- priority boosting based on average packet size
- bulk flow detection based on number of packets per second
- dynamically add IP entries with timeout

Signed-off-by: Felix Fietkau <nbd@nbd.name>

package/network/config/qosify/files/qosify.conf

@@ -0,0 +1,30 @@
+config defaults
+	list defaults /etc/qosify-defaults.conf
+	option dscp_prio CS5
+	option dscp_icmp CS6
+	option dscp_bulk CS0
+	option dscp_default_udp	CS4
+	option bulk_trigger_timeout 5
+	option bulk_trigger_pps	100
+	option prio_max_avg_pkt_len 500
+
+config interface wan
+	option name wan
+	option disabled 1
+	option bandwidth_up 100mbit
+	option bandwidth_down 100mbit
+	# defaults:
+	option ingress 1
+	option egress 1
+	option mode diffserv4
+	option host_isolate 1
+	option autorate_ingress 1
+	option ingress_options ""
+	option egress_options ""
+	option options ""
+
+config device wandev
+	option disabled 1
+	option name wan
+	option bandwidth 100mbit
+