Merge from gnulib and try to repair bad merge

This attempts to repair problems introduced by the bad merge
5491fd1098d27b3ba3db054076b9ab60fb3558dc.  The easiest way for me
to fix the badly-merged gnulib files was to run
'admin/merge-gnulib', so I did that, which also imported the
following changes:
* build-aux/update-copyright, m4/gnulib.m4:
Update from gnulib, incorporating:
2015-01-15 time: port to MinGW32 3.21
2015-01-15 update-copyright: apply to self
2015-01-11 update-copyright: recognize groff's \(co marker

1 files changed, 2 insertions, 0 deletions

diff --git a/lib/time.in.h b/lib/time.in.h
index 8d721c5ab84..1a6b746ccab 100644
--- a/lib/time.in.h
+++ b/lib/time.in.h
@@ -55,6 +55,8 @@
 #   include <sys/time.h>
 #  elif @PTHREAD_H_DEFINES_STRUCT_TIMESPEC@
 #   include <pthread.h>
+#  elif @UNISTD_H_DEFINES_STRUCT_TIMESPEC@
+#   include <unistd.h>
 #  else
 
 #   ifdef __cplusplus