Mention new dlopen functionality.

[exim.git] / doc / doc-txt / NewStuff

diff --git a/doc/doc-txt/NewStuff b/doc/doc-txt/NewStuff
index cedfc6e253dc0d779a53ed31b8d2f2cc54ec9463..8c8aeaa506185a80697816caed033ab226231a43 100644 (file)
--- a/doc/doc-txt/NewStuff
+++ b/doc/doc-txt/NewStuff
@@ -9,9 +9,22 @@ test from the snapshots or the CVS before the documentation is updated. Once
 the documentation is updated, this file is reduced to a short list.
 
 
+Version 4.74
+------------
+
+ 1. Exim now supports loading some lookup types at run-time, using your
+    platform's dlopen() functionality.  This has limited platform support
+    and the intention is not to support every variant, it's limited to
+    dlopen().  This permits the main Exim binary to not be linked against
+    all the libraries needed for all the lookup types.
+
+
 Version 4.73
 ------------
 
+ NOTE: this version is not guaranteed backwards-compatible, please read the
+       items below carefully
+
  1. A new main configuration option, "openssl_options", is available if Exim
     is built with SSL support provided by OpenSSL.  The option allows
     administrators to specify OpenSSL options to be used on connections;
@@ -97,6 +110,22 @@ Version 4.73
 11. [POSSIBLE CONFIG BREAKAGE] The default value for system_filter_user is now
     the Exim run-time user, instead of root.
 
+12. [POSSIBLE CONFIG BREAKAGE] ALT_CONFIG_ROOT_ONLY is no longer optional and
+    is forced on.  This is mitigated by the new build option
+    TRUSTED_CONFIG_LIST which defines a list of configuration files which
+    are trusted; one per line. If a config file is owned by root and matches
+    a pathname in the list, then it may be invoked by the Exim build-time
+    user without Exim relinquishing root privileges.
+
+13. [POSSIBLE CONFIG BREAKAGE] The Exim user is no longer automatically
+    trusted to supply -D<Macro[=Value]> overrides on the command-line.  Going
+    forward, we recommend using TRUSTED_CONFIG_LIST with shim configs that
+    include the main config.  As a transition mechanism, we are temporarily
+    providing a work-around: the new build option WHITELIST_D_MACROS provides
+    a colon-separated list of macro names which may be overriden by the Exim
+    run-time user.  The values of these macros are constrained to the regex
+    ^[A-Za-z0-9_/.-]*$ (which explicitly does allow for empty values).
+
 
 Version 4.72
 ------------