Bugfixes.

* libmu_dbm/dbm.c (mu_dbm_create_from_url): Parameter list beginning
with a negative parameter implies default safety criteria.
Fix semantics of the "default" keyword: it is different from "all".
* libmu_dbm/mudbm.h (DEFAULT_DBM_SAFETY_FLAGS): Remove.  Not needed now.
* pop3d/bulletin.c (read_bulletin_db): Remove a leftover call to
mu_dbm_safety_set_flags.

@@ -179,6 +179,9 @@ mu_dbm_create_from_url (mu_url_t url, mu_dbm_file_t *db, int defsafety)
 
 	  if (*name == '-')
 	    {
+	      if (!safety_flags_set)
+		/* Imply default safety settings */
+		safety_flags = defsafety;
 	      negate = 1;
 	      name++;
 	    }
@@ -224,7 +227,7 @@ mu_dbm_create_from_url (mu_url_t url, mu_dbm_file_t *db, int defsafety)
 	    }
 	  else if (strcmp (name, "default") == 0)
 	    {
-	      val = DEFAULT_DBM_SAFETY_FLAGS;
+	      val = defsafety;
 	    }
 	  else if (mu_file_safety_name_to_code (name, &val))
 	    return MU_ERR_URL_INVALID_PARAMETER;

@@ -28,8 +28,6 @@
     }								\
   while (0)
 
-#define DEFAULT_DBM_SAFETY_FLAGS MU_FILE_SAFETY_ALL
-
 #ifdef WITH_GDBM
 extern struct mu_dbm_impl _mu_dbm_gdbm;
 #endif

@@ -133,8 +133,6 @@ read_bulletin_db (size_t *pnum)
       return rc;
     }
 
-  mu_dbm_safety_set_flags (db, DEFAULT_GROUP_DB_SAFETY);
-
   rc = mu_dbm_safety_check (db);
   if (rc)
     {