Subject: update gnulib+copyright dates for 2017

From: Jim Meyering <[email-masked]>
Date: Sun, 01 Jan 2017 12:57:18 +0100

I've just pushed this all-mechanical commit, so that
"make syntax-check" continues to pass:

  maint: update gnulib and copyright dates for 2017
  * gnulib: Update to latest.
  * all files: Run "make update-copyright".

[actual patch omitted]