Belated README.UPDATING notes for Exim 4.91

People skip versions and move past them later, so while it's too late
for 4.91, this will still help people moving to 4.92 from pre-4.91 in
future.

Note that none of these strictly needed to be documented here:
experimental features, features marked as deprecated for many many
years, etc.  But let's err on the side of caution and include "things
which will break if you try to upgrade without changing Local/Makefile".

diff --git a/src/README.UPDATING b/src/README.UPDATING
index 05b3d9d97eb8e0f77becc88ed397c9703846fac4..73b52e4a01739f12a1320a9b62b3b126d728f13e 100644 (file)
--- a/src/README.UPDATING
+++ b/src/README.UPDATING
@@ -26,6 +26,27 @@ The rest of this document contains information about changes in 4.xx releases
 that might affect a running system.
 
 
+Exim version 4.91
+-----------------
+
+ * DANE and SPF have been promoted from Experimental to Supported status, thus
+   the options to enable them in Local/Makefile have been renamed.
+   See current src/EDITME for full details, including changes in dependencies,
+   but loosely: replace EXPERIMENTAL_SPF with SUPPORT_SPF and replace
+   EXPERIMENTAL_DANE with SUPPORT_DANE.
+
+ * Ancient ClamAV stream support, long deprecated by ClamAV, has been removed;
+   if you were building with WITH_OLD_CLAMAV_STREAM enabled then your problems
+   have marginally increased.
+
+ * A number of logging changes; if relying upon the previous DKIM additional
+   log-line, explicit log_selector configuration is needed to keep it.
+
+ * Other incompatible changes in EXPERIMENTAL_* features, read NewStuff and
+   ChangeLog carefully if relying upon an experimental feature such as DMARC.
+   Note that this includes changes to SPF as it was promoted into Supported.
+
+
 Exim version 4.89
 -----------------