+ 5. There are several places where Exim runs a non-Exim command in a
+ subprocess. The SIGUSR1 signal should be disabled for these processes. This
+ was being done only for the command run by the queryprogram router. It is
+ now done for all such subprocesses. The other cases are: ${run, transport
+ filters, and the commands run by the lmtp and pipe transports.
+
+ 6. Added CONFIGURE_GROUP build-time option.
+
+ 7. Some older OS have a limit of 256 on the maximum number of file
+ descriptors. Exim was using setrlimit() to set 1000 as a large value
+ unlikely to be exceeded. Change 4.43/17 caused a lot of logging on these
+ systems. I've change it so that if it can't get 1000, it tries for 256.
+