Allow always IDN input in dig
Even when stdout is non-interactive terminal, allow unicode characters to be encoded into ACE form. Still disable IDN output, but unless +noidnin or IDN_DISABLE=1 env is detected, consider input as locale defined name.
Provides more isolated change, which issue #3527 (closed) introduced similar behavior into 9.19 with more changes.
Signed-off-by: Petr Menšík pemensik@redhat.com