Sync with v1.8.2.3

* maint:
  Git 1.8.2.3
  t5004: avoid using tar for checking emptiness of archive
  t5004: ignore pax global header file
  mergetools/kdiff3: do not use --auto when diffing
  transport-helper: trivial style cleanup

Documentation/RelNotes/1.8.2.3.txt

+Git v1.8.2.3 Release Notes
+==========================
+
+Fixes since v1.8.2.2
+--------------------
+
+ * "rev-list --stdin" and friends kept bogus pointers into the input
+   buffer around as human readable object names.  This was not a
+   huge problem but was exposed by a new change that uses these
+   names in error output.
+
+ * When "git difftool" drove "kdiff3", it mistakenly passed --auto
+   option that was meant while resolving merge conflicts.
+
+ * "git remote add" command did not diagnose extra command line
+   arguments as an error and silently ignored them.
+
+Also contains a handful of trivial code clean-ups, documentation
+updates, updates to the test suite, etc.

Documentation/git.txt

@@ -43,9 +43,10 @@ unreleased) version of Git, that is available from 'master'
 branch of the `git.git` repository.
 Documentation for older releases are available here:
 
-* link:v1.8.2.2/git.html[documentation for release 1.8.2.2]
+* link:v1.8.2.3/git.html[documentation for release 1.8.2.3]
 
 * release notes for
+  link:RelNotes/1.8.2.3.txt[1.8.2.3].
   link:RelNotes/1.8.2.2.txt[1.8.2.2].
   link:RelNotes/1.8.2.1.txt[1.8.2.1].
   link:RelNotes/1.8.2.txt[1.8.2].

mergetools/kdiff3

 diff_cmd () {
-	"$merge_tool_path" --auto \
+	"$merge_tool_path" \
 		--L1 "$MERGED (A)" --L2 "$MERGED (B)" \
 		"$LOCAL" "$REMOTE" >/dev/null 2>&1
 }

t/t5004-archive-corner-cases.sh

@@ -23,15 +23,14 @@ check_dir() {
 			echo "$dir/$i"
 		done
 	} | sort >expect &&
-	find "$dir" -print | sort >actual &&
+	find "$dir" ! -name pax_global_header -print | sort >actual &&
 	test_cmp expect actual
 }
 
 test_expect_success 'tar archive of empty tree is empty' '
 	git archive --format=tar HEAD: >empty.tar &&
-	make_dir extract &&
-	"$TAR" xf empty.tar -C extract &&
-	check_dir extract
+	perl -e "print \"\\0\" x 10240" >10knuls.tar &&
+	test_cmp 10knuls.tar empty.tar
 '
 
 test_expect_success 'tar archive of empty tree with prefix' '

transport-helper.c

@@ -214,9 +214,8 @@ static struct child_process *get_helper(struct transport *transport)
 		int i;
 		data->refspec_nr = refspec_nr;
 		data->refspecs = parse_fetch_refspec(refspec_nr, refspecs);
-		for (i = 0; i < refspec_nr; i++) {
+		for (i = 0; i < refspec_nr; i++)
 			free((char *)refspecs[i]);
-		}
 		free(refspecs);
 	}
 	strbuf_release(&buf);