gpg: Print PROGRESS status lines during key generation.
* g10/call-agent.c (cache_nonce_status_cb): Rewrite by using has_leading_keyword. Handle PROGRESS lines.
- GnuPG-bug-id: T1415
- Co-authored-by: Daiki Ueno <ueno@gnu.org>
- Signed-off-by: Werner Koch <wk@gnupg.org>