Geoff,

Currently, mklog resets the permissions on a patch file:
...
$ touch tmp.patch
$ ls -la tmp.patch
-rw-rw-r-- 1 vries vries 0 mei 31 09:17 tmp.patch
$ ./contrib/mklog tmp.patch
$ ls -la tmp.patch
-rw------- 1 vries vries 59 mei 31 09:17 tmp.patch
$
...

This patch fixes that:
...
$ rm tmp.patch
$ touch tmp.patch
$ ls -la tmp.patch
-rw-rw-r-- 1 vries vries 0 mei 31 09:41 tmp.patch
$ ./contrib/mklog tmp.patch
$ ls -la tmp.patch
-rw-rw-r-- 1 vries vries 59 mei 31 09:41 tmp.patch
...

OK for trunk?

Thanks,
- Tom