Make lookup of symbolic names in the reply default
The -H option has been removed. It was setting F_HOSTNAME flag and the-n option was clearing it. The default value of the flag was 0 so the -n option was effective only when it was used with -H option.
Making lookup of symbolic names in the reply to be default, -n option can be used to set the flag for numeric output only. Thus, -H option is no longer necessary.
This unifies the behavior with ping and will simplify unification of option parsing.
Submitted by: Ján Sučan <firstname.lastname@example.org>
Sponsored by: Google LLC (Google Summer of Code 2019)