MINOR: add log-bufsize option to server params #448

Job	Run time
generate-models	1m 32s
HAProxy check commit message	0s
generate-specification	42s
go mod tidy	5s
lint-spec	8s
Build	43s
golangci-lint	1m 25s
Tests	2m 58s
e2e on HAProxy (2.1)	41s
e2e on HAProxy (2.2)	40s
e2e on HAProxy (2.3)	42s
e2e on HAProxy (2.4)	42s
e2e on HAProxy (2.5)	44s
e2e on HAProxy (2.6)	42s
e2e on HAProxy (2.7)	47s
e2e on HAProxy (2.8)	39s
	13m 10s

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