[FM Discuss] command line manual - please have a squiz

[Andy Oram]

I just edited the Regular Expressions section. I didn't want to keep control over it--that's contrary to the spirit of wiki editing--and was planning to let someone else do it, but I got the impression people just objected to the use of one word (fuzz) and the proposed changes were going far beyond what was necessary. I just changed the word to something else (usually "indeterminate") and found a few other ways to improve the section. I think that's the simplest solution, but everybody can still go in and make changes.

As a bonus, I added a few more sections to it.

Andy