Document NEW processing on security-master.

docs/debian-specific

+DEBIAN-SPECIFIC NOTES                                  -*- mode: Org -*-
+
+* security archive
+** NEW processing
+- cronoff
+- dak process-new, accept
+- cd /srv/security-master.debian.org/queue/new/COMMENTS
+- Change first line to NOTOK, add comment "Moving back to unchecked."
+- dak process-policy new; dak clean-suites
+- cd /srv/security-master.debian.org/queue/reject
+- dcmd mv -n bla.changes ../unchecked
+- /srv/security-master.debian.org/dak/config/debian-security/cron.unchecked
+- cronon