cvs, stop ignoring *@#%&@# files/directories named core

[Stuart Henderson]

core dumps on OpenBSD are not named 'core' anyway so ignoring them
is pointless and gets in the way.

OK?

Index: gnu/usr.bin/cvs/src/ignore.c
===================================================================
RCS file: /cvs/src/gnu/usr.bin/cvs/src/ignore.c,v
retrieving revision 1.15
diff -u -p -r1.15 ignore.c
--- gnu/usr.bin/cvs/src/ignore.c        5 Jan 2012 19:45:20 -0000       1.15
+++ gnu/usr.bin/cvs/src/ignore.c        20 Mar 2012 10:06:31 -0000
@@ -33,7 +33,7 @@ static int ign_size;                  /* This many slot
 static int ign_hold = -1;              /* Index where first "temporary" item
                                         * is held */
 
-const char *ign_default = ". .. core RCSLOG tags TAGS RCS SCCS .make.state\
+const char *ign_default = ". .. RCSLOG tags TAGS RCS SCCS .make.state\
  .*.swp\
  .nse_depinfo #* .#* cvslog.* ,* CVS CVS.adm .del-* *.a *.olb *.o *.obj\
  *.so *.Z *~ *.old *.elc *.ln *.bak *.BAK *.orig *.rej *.exe _$* *$ *.depend";