Harmonize response header behavior #708

Job	Run time
mono_repo self validate	23s
analyze_and_format; Dart 2.19.0; PKG: pkgs/http_client_conformance_tests; `dart analyze --fatal-i...	38s
analyze_and_format; Dart 3.0.0; PKG: pkgs/http; `dart analyze --fatal-infos`	29s
analyze_and_format; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests; `dart analyze ...	42s
analyze_and_format; Dart dev; PKGS: pkgs/http, pkgs/http_client_conformance_tests; `dart format -...	26s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart test --platform chrome`	2m 17s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart test --platform vm`	42s
unit_test; Dart dev; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_defau...	22s
unit_test; Dart 3.0.0; PKG: pkgs/http; `dart run --define=no_default_http_client=true test/no_def...	22s
unit_test; Dart dev; PKG: pkgs/http; `dart test --platform chrome`	2m 13s
unit_test; Dart dev; PKG: pkgs/http; `dart test --platform vm`	45s
	9m 19s

Provide feedback