Add @addisonj's MAX_DIRECT_MEMORY change

Author: velvia

notes/0.6.2.markdown

@@ -8,6 +8,7 @@
 * DEBUG_PORT env var allows remote debugging (@addisonj)
 * UI links to status/config (@h0ke)
 * Fix bug - invalid error w no user/pass #329 (@slater-ben)
+* Expose MAX_DIRECT_MEMORY to adjust direct memory buffer size (@addisonj)
 * Redirect /dev/null to stdin in server_start.sh (@apivovarov)
 * Database migration scripts and better table definitions (@v-gerasimov)
 * Chinese doc updates (@zp-j, @liujuncheng)