please note that the commit deadline for 18.104.22.168 (aka rc1) is on
Monday, January 7, 2013.
IMPORTANT: we are reaching the final phase, so all changes in the 4-0
branch will need one review after the rc1 deadline. By other words, the
reviewing requirement starts on Tuesday, January 8, 2013.
Note that there are planned two more release candidates with deadlines
on January 21, and 28, 2013.