BUG/MINOR: remove required for redir_option for http_request_rule #522

Job	Run time
generate-specification	56s
HAProxy check commit message	0s
generate-models	1m 9s
license-check	20s
Build	26s
lint-spec	7s
golangci-lint	1m 0s
go mod tidy	7s
Tests	2m 29s
e2e on HAProxy (2.1)	47s
e2e on HAProxy (2.2)	43s
e2e on HAProxy (2.3)	43s
e2e on HAProxy (2.4)	46s
e2e on HAProxy (2.5)	47s
e2e on HAProxy (2.6)	46s
e2e on HAProxy (2.7)	41s
e2e on HAProxy (2.8)	42s
	12m 29s

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