13.0R/relnotes - Add entry for changes to newsyslog(8) default config

The default /etc/newsyslog.conf now only includes files if they end with
".conf" and do not begin with a "." character.

Approved by:	gjb
Differential Revision:	https://reviews.freebsd.org/D29368

website/content/en/releases/13.0R/relnotes.adoc

@@ -118,6 +118,13 @@ now be set via man:login.conf[5].
 gitref:21c1a93c048f[repository=src], gitref:736a5a6d1dbb[repository=src],
 gitref:7466dbd68487[repository=src]
 
+The default config for man:newsyslog[8] will now only include files from the
+/etc/newsyslog.conf.d/ and /usr/local/etc/newsyslog.conf.d/ directories if the
+filename ends with ".conf" and does not begin with a "." character.
+This matches the man:syslog.conf[5] functionality, and also prevents ".sample"
+or ".pkgnew" files being included.
+gitref:9165316ff6bf[repository=src]
+
 The kernel now supports enforcing a W^X memory mapping policy for user
 processes.
 The policy is not enforced by default but can be enabled by setting the