Log Message:
Update to 1.4.16:

* Noteworthy changes in release 1.4.16 (2011-03-01) [stable]

** Fix regressions in the `index' builtin.  On glibc platforms, this
   avoids false positives from a strstr bug in glibc 2.9 through 2.12;
   on many other platforms, it fixes two separate regressions, a false
   positive introduced in 1.4.11 and a false negative in 1.4.15.

** A number of portability improvements inherited from gnulib.