var net/http/internal/httpcommon.commonLowerHeader

4 uses

	net/http/internal/httpcommon (current package)
		httpcommon.go#L70: 	commonLowerHeader map[string]string // Go-Canonical-Case -> lower-case
		httpcommon.go#L138: 	commonLowerHeader = make(map[string]string, len(common))
		httpcommon.go#L142: 		commonLowerHeader[chk] = v
		httpcommon.go#L151: 	if s, ok := commonLowerHeader[v]; ok {