dirmngr: Do PTR lookups only for 'keyserver --hosttable'.
* dirmngr/ks-engine-hkp.c (hostinfo_s): Remove fields v4addr and v5addr and add fields iporname and iporname_valid. (create_new_hostinfo): Clear them. (add_host): Remove the code to set the v4addr and v6addr fields. (ks_hkp_print_hosttable): Remove printing of the fields. Compute the iporname field and display it. (ks_hkp_reload): Force re-computing of the iporname field in ks_hkp_print_hosttable.
- GnuPG-bug-id: T2928
- Signed-off-by: Werner Koch <wk@gnupg.org>