FreeBSD/doc 6c6fa12 (r53260)share/xml news.xml

Add a newsflash entry mentioning the FreeBSD.org outbound email
system is going to change, as announced at:
https://lists.freebsd.org/pipermail/freebsd-announce/2019-July/001892.html

Reviewed by:    peter
Sponsored by:   Rubicon Communications, LLC (Netgate)
DeltaFile
+17-0share/xml/news.xml
+17-01 files

UnifiedSplitRaw