dirmngr: Do not assume that /etc/hosts exists.

dirmngr: Do not assume that /etc/hosts exists.

* dirmngr/dns-stuff.c (libdns_init): Do not bail out.
--

A standard Windows installation does not have a hosts file and thus we
can't bail out here.  We should also not bail out on a Unix system
because /etc/hosts is just one method in  nsswitch.conf.

Fixes-commit: 88f1505f0613894d5544290a170119eb538921e5
Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 5d873f288e86edfb684f4dd57ac36466b06494a4)

Gbp-Pq: Name 0060-dirmngr-Do-not-assume-that-etc-hosts-exists.patch