avoid strict aliasing problems
add support for TPS65950 watchdog timer
reset todr clock on shutdown
add TPS65950 RTC support
add a sync to make it less likely to boot with /etc pointing to nothing after
a crash.
Happy 2013 everybody
Correctly ignore duplicate definitions.  "continue" applies only to the
innermost loop.
Add -l and -L options to units(1).  "-l" simply lists all unit
definitions, while "-L" alsoreduces them to depend only on a few
primitive units (such as m, kg, sec).
units(1): add -l and -L options.  [apb 20130101]