drill: Historical version dated 1997-10-20.
drill: Historical version dated 1998-03-01.
drill: Historical version dated 2010-05-11.
drill: Historical version dated 2010-05-11.
drill: Historical version dated 2010-05-11.
drill: Historical version dated 2010-05-14.
drill: Historical version dated 2010-05-14.
drill: Historical version dated 2010-05-14.
drill: Historical version dated 2010-05-17.
drill: Historical version dated 2010-05-24.
LICENSE: Updated copyright dates.