Merge branch 'master' into ph/strbuf

* master: (94 commits)
  Fixed update-hook example allow-users format.
  Documentation/git-svn: updated design philosophy notes
  t/t4014: test "am -3" with mode-only change.
  git-commit.sh: Shell script cleanup
  preserve executable bits in zip archives
  Fix lapsus in builtin-apply.c
  git-push: documentation and tests for pushing only branches
  git-svnimport: Use separate arguments in the pipe for git-rev-parse
  contrib/fast-import: add perl version of simple example
  contrib/fast-import: add simple shell example
  rev-list --bisect: Bisection "distance" clean up.
  rev-list --bisect: Move some bisection code into best_bisection.
  rev-list --bisect: Move finding bisection into do_find_bisection.
  Document ls-files --with-tree=<tree-ish>
  git-commit: partial commit of paths only removed from the index
  git-commit: Allow partial commit of file removal.
  send-email: make message-id generation a bit more robust
  git-apply: fix whitespace stripping
  git-gui: Disable native platform text selection in "lists"
  apply --index-info: fall back to current index for mode changes
  ...

builtin-log.c

@@ -437,6 +437,34 @@ static void gen_message_id(char *dest, unsigned int length, char *base)
 		 (int)(email_end - email_start - 1), email_start + 1);
 }
 
+static const char *clean_message_id(const char *msg_id)
+{
+	char ch;
+	const char *a, *z, *m;
+	char *n;
+	size_t len;
+
+	m = msg_id;
+	while ((ch = *m) && (isspace(ch) || (ch == '<')))
+		m++;
+	a = m;
+	z = NULL;
+	while ((ch = *m)) {
+		if (!isspace(ch) && (ch != '>'))
+			z = m;
+		m++;
+	}
+	if (!z)
+		die("insane in-reply-to: %s", msg_id);
+	if (++z == m)
+		return a;
+	len = z - a;
+	n = xmalloc(len + 1);
+	memcpy(n, a, len);
+	n[len] = 0;
+	return n;
+}
+
 int cmd_format_patch(int argc, const char **argv, const char *prefix)
 {
 	struct commit *commit;
@@ -625,7 +653,8 @@ int cmd_format_patch(int argc, const char **argv, const char *prefix)
 	if (numbered)
 		rev.total = total + start_number - 1;
 	rev.add_signoff = add_signoff;
-	rev.ref_message_id = in_reply_to;
+	if (in_reply_to)
+		rev.ref_message_id = clean_message_id(in_reply_to);
 	while (0 <= --nr) {
 		int shown;
 		commit = list[nr];