dirmngr,w32: Load all system provided certificates.
* dirmngr/certcache.c (CERTOPENSYSTEMSTORE) [W32]: New type. (CERTENUMCERTIFICATESINSTORE) [W32]: New type. (CERTCLOSESTORE) [W32]: New type. (load_certs_from_file) [W32]: Do not build. (load_certs_from_w32_store) [W32]: New. (load_certs_from_system) [W32]: Call new function.
GnuTLS loads the system certificates from the "ROOT" and "CA" store;
thus we do the same. On a Visa box you may for example see 21 from
"ROOT" and 6 from "CA".
- Signed-off-by: Werner Koch <wk@gnupg.org>