[Crash-utility] About the comments

hi there, I'm a freshman to CRASH, I want to make some contribute for it as I found it very usefull, especially with Kdump. But i run to a little trouble when i read the source code of it for there is not enough comments for some critical data structures say, struct syment, struct bt_info, etc. I would really appreciate it if there would be some progress on that. Thanks. -- Hu Keping