Fix GNU long link header.

* src/create.c (write_gnu_long_link): Set timestamp to
0 for backward compatibility.  Bug reported by David Barri.
* THANKS: Update.

THANKS

@@ -119,6 +119,7 @@ Danny R. Johnston	danny@cs.weber.edu
 Dave Barr		barr@math.psu.edu
 Dave Gentzel		gentzel@nova.enet.dec.com
 Dave Gregorich		dtg@ipac.caltech.edu
+David Barri		japgolly@gmail.com
 David Brown		davidb@davidb.org
 David J. MacKenzie	djm@uunet.uu.net
 David Johnson		David.W.Johnson@colorado.edu

src/create.c

@@ -543,7 +543,7 @@ write_gnu_long_link (struct tar_stat_info *st, const char *p, char type)
   union block *header;
   char *tmpname;
 
-  header = start_private_header ("././@LongLink", size, start_time.tv_sec);
+  header = start_private_header ("././@LongLink", size, 0);
   uid_to_uname (0, &tmpname);
   UNAME_TO_CHARS (tmpname, header->header.uname);
   free (tmpname);