Time for 1.6.18?

[Blair Zajac]

With a fsfs corruption bug found and fixed this week [1], should we cut 
a 1.6.18?  1.6.17 was tagged 8 months ago.  If we don't cut a new 
release, then we should probably let downstream distributions know about 
the issue so they can patch their builds.

Blair
[1] http://svn.apache.org/viewvc?view=revision&revision=1240752