Update NEWS for 0.2.8

NEWS

@@ -1,3 +1,12 @@
+Changes between 0.2.7 and 0.2.8:
+--------------------------------
+
+  * Implement SMB SESSION LOGOFF (0x74)
+  * Add smb_stat_list_next() to reduce directory traversal speed
+  * Fix guest login
+  * Fix compilation when using compatibility layer
+
+
 Changes between 0.2.6 and 0.2.7:
 --------------------------------