feat: add max-affected preference to prefer header #3083

Loadtest Results

param	v12.0.1	main	head
bytes_in.mean	1030.4163184517265	1030.3526508226691	1030.4028602551039
bytes_in.total	28111818	28180145	29324235
bytes_out.mean	3848.3542262297487	3848.0761608775138	3848.3658947960225
bytes_out.total	104990800	105244883	109520645
duration	60013848567	60000274387	60008170815
errors.0	400 Bad Request	400 Bad Request	400 Bad Request
latencies.50th	946618	948325	918959
latencies.90th	2112391	2059637	1973388
latencies.95th	14383449	14330889	13641319
latencies.99th	14869302	14785496	14184729
latencies.max	25990088	25142777	24886484
latencies.mean	2198737	2192772	2107580
latencies.min	154617	155008	152664
latencies.total	59985953170	59972326754	59979621185
rate	454.5950751607295	455.83124876385244	474.2520828994544
requests	27282	27350	28459
status_codes.200	14882	14919	15524
status_codes.201	2480	2486	2587
status_codes.204	7440	7458	7761
status_codes.400	2480	2487	2587
success	0.9090975734916791	0.909067641681901	0.909097297867107
throughput	413.2652113590634	414.375160694914	431.1352062850477
wait	881244	908981	846363