Increase memcached cache duration to 2 hours

And completly disable dovecot's negative cache

root/etc/e-smith/templates/etc/dovecot/dovecot.conf/014AuthCache

@@ -1,3 +1,3 @@
 auth_cache_size = { $dovecot{'AuthCacheSize'} || '5242880' }
-auth_cache_ttl = 1800
+auth_cache_ttl = 7200
-auth_cache_negative_ttl = 1
+auth_cache_negative_ttl = 0

root/etc/e-smith/templates/etc/sogo/sogo.conf/16memcached

@@ -1,2 +1,2 @@
         SOGoMemcachedHost = "/var/run/sogo/memcached.sock";
-        SOGoCacheCleanupInterval = 1800;
+        SOGoCacheCleanupInterval = 7200;