[Linux-cluster] DLM Book updated

[Christine Caulfield]

I have updated the "Programming Locking Applications" document. Lots of 
typos and bizarre sentences have been fixed (thanks Bob!). I have also 
added a new section (chapter 5) which is an overview of the DLM 
internals for those that want to understand a little of how and where 
locks are mastered etc.

It's no substitute for reading the code but it might make it a little 
easier :)

http://people.redhat.com/ccaulfie/docs/rhdlmbook.pdf

Chrissie