in proxy/lib/proxy/options.go [179:193]
func splitValuesByCommas(str string) []string {
if len(str) == 0 {
return nil
}
var res []string
for _, s := range strings.Split(str, ",") {
trimmed := strings.TrimSpace(s)
if len(trimmed) > 0 {
res = append(res, trimmed)
}
}
return res
}