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We need to take care that several files are also used in gnupg 1.9 and
there by the scdaemon which is a bit different to the direct
integration in gpg 1.3. In general they should all be maintained in
1.9 but while preparing 1.4 its okay to do it in 1.3. We just need to
take some care not to break 1.9 to heavily.

app-openpgp.c: Made all strings translatable.
(verify_chv3) [GNUPG_MAJOR_VERSION]: Make opt.allow_admin
available for use in gnupg 2.
(verify_chv3): Reimplemented countdown showing to use only
functions from this module.