sm: On Windows close the kbx files at several places.
* kbx/keybox-search.c (keybox_search_reset) [W32]: Always close. * kbx/keybox-init.c (keybox_close_all_files): New. * sm/keydb.c (keydb_close_all_files): New. * sm/call-dirmngr.c (gpgsm_dirmngr_isvalid): Call new function. (gpgsm_dirmngr_lookup): Ditto. (gpgsm_dirmngr_run_command): Ditto.
We need to make sure that there are no open files on Windows. Thus we
close them at several strategic locations.
- GnuPG-bug-id: T4505