Fix the way ${extract is skipped in the untaken branch of a conditional.

[exim.git] / src / README.UPDATING

diff --git a/src/README.UPDATING b/src/README.UPDATING
index 45822fdef2c0b4f783bb77e8c6b049c94df4c291..fc0298501c98dccf3e3db5fb954e9435d30993ab 100644 (file)
--- a/src/README.UPDATING
+++ b/src/README.UPDATING
@@ -1,4 +1,4 @@
-$Cambridge: exim/src/README.UPDATING,v 1.13 2006/09/25 11:25:37 ph10 Exp $
+$Cambridge: exim/src/README.UPDATING,v 1.16 2007/06/20 14:19:23 ph10 Exp $
 
 This document contains detailed information about incompatibilities that might
 be encountered when upgrading from one release of Exim to another. The
@@ -28,6 +28,14 @@ The rest of this document contains information about changes in 4.xx releases
 that might affect a running system.
 
 
+Exim version 4.68
+-----------------
+
+1. The internal implementation of the database keys that are used for ACL
+ratelimiting has been tidied up. This means that an update to 4.68 might cause
+Exim to "forget" previous rates that it had calculated, and reset them to zero.
+
+
 Exim version 4.64
 -----------------
 
@@ -41,6 +49,27 @@ there is no remote transport (possible with a router that sets up host
 addresses), $smtp_active_hostname is used. This change is mentioned here in
 case somebody is relying on the use of $smtp_active_hostname.
 
+2. A bug has been fixed that might just possibly be something that is relied on
+in some configurations. In expansion items such as ${if >{xxx}{yyy}...} an
+empty string (that is {}) was being interpreted as if it was {0} and therefore
+treated as the number zero. From release 4.64, such strings cause an error
+because a decimal number, possibly followed by K or M, is required (as has
+always been documented).
+
+3. There has been a change to the GnuTLS support (ChangeLog/PH/20) to improve
+Exim's performance. Unfortunately, this has the side effect of being slightly
+non-upwards compatible for versions 4.50 and earlier. If you are upgrading from
+one of these earlier versions and you use GnuTLS, you must remove the file
+called gnutls-params in Exim's spool directory. If you don't do this, you will
+see this error:
+
+  TLS error on connection from ... (DH params import): Base64 decoding error.
+
+Removing the file causes Exim to recompute the relevant encryption parameters
+and cache them in the new format that was introduced for release 4.51 (May
+2005). If you are upgrading from release 4.51 or later, there should be no
+problem.
+
 
 Exim version 4.63
 -----------------