gpg: Do not require a trustdb with --always-trust.

* g10/tdbio.c (tdbio_set_dbname): Add arg R_NOFILE.
* g10/trustdb.c (trustdb_args): Add field no_trustdb.
(init_trustdb): Set that field.
(revalidation_mark):  Take care of a nonexistent trustdb file.
(read_trust_options): Ditto.
(tdb_get_ownertrust): Ditto.
(tdb_get_min_ownertrust): Ditto.
(tdb_update_ownertrust): Ditto.
(update_min_ownertrust): Ditto.
(tdb_clear_ownertrusts): Ditto.
(tdb_cache_disabled_value): Ditto.
(tdb_check_trustdb_stale): Ditto.
(tdb_get_validity_core): Ditto.
* g10/gpg.c (main): Do not create a trustdb with most commands for
trust-model always.
--

This slightly changes the semantics of most commands in that they
won't create a trustdb if --trust-model=always is used.  It just does
not make sense to create a trustdb if there is no need for it.

Signed-off-by: Werner Koch <wk@gnupg.org>
(cherry picked from commit 1a0eeaacd1bf09fe5125dbc3f56016bc20f3512e)

Resolved conflicts:
	NEWS
	g10/trustdb.c: Manually apply changes due to changed
                       function names.

Note that this also includes the fix for clear_ownertrust, see
GnuPG-bug-id: 1622.

1 files changed, 4 insertions, 0 deletions

diff --git a/NEWS b/NEWS
index 2efc395b5..da771f115 100644
--- a/NEWS
+++ b/NEWS
@@ -38,6 +38,10 @@ Noteworthy changes in version 2.1.0-betaN (unreleased)
  * Only the major version number is by default included in the armored
    output.
 
+ * Do not create a trustdb file if --trust-model=always is used.
+
+ * Protect against rogue keyservers sending secret keys.
+
 
 Noteworthy changes in version 2.1.0beta3 (2011-12-20)
 -----------------------------------------------------