dirmngr: Emit SOURCE status also on NO_DATA.
* dirmngr/ks-engine-hkp.c (ks_hkp_search): Send SOURCE status also on NO DATA error. (ks_hkp_get): Ditto. * g10/call-dirmngr.c (gpg_dirmngr_ks_search): Print "data source" info also on error. (gpg_dirmngr_ks_get): Ditto.
If a keyserver does not return any data it can be useful to know which
keyserver out of the pool answered.
- Signed-off-by: Werner Koch <wk@gnupg.org>