v1.8 Release

Finish the release notes for the 1.8 release.

Signed-off-by: Zach Brown <zab@versity.com>

ReleaseNotes.md

@@ -1,6 +1,23 @@
 Versity ScoutFS Release Notes
 =============================
 
+---
+v1.8
+\
+*Oct 18, 2022*
+
+Add support for Linux POSIX Access Control Lists, as described in
+acl(5).  Mount options are added to enable ("acl") and disable ("noacl")
+support.  The default is to support ACLs.  ACLs are stored in the
+existing extended attribute scheme so adding support is does not require
+a format change.
+
+Add options to control data extent preallocation.  The default behavior
+does not change.  The options can relax the limits on preallocation
+which will then trigger under more write patterns and increase the risk
+of preallocated space which is never used.  The options are described in
+scoutfs(5).
+
 ---
 v1.7
 \