modify sample codes in SYNPOSIS to work more stably

This is another pull request against #25

The response of google.com often changes and is not always the same.
For example,
 'http://google.com/search?q=foobar`  returns `301 Moved`
```html
<H1>301 Moved</H1>
The document has moved
<A HREF="http://www.google.com/search?q=foobar">here</A>.
```

and "http://www.google.com/search?q=foobar" returns `403 Forbidden`
```sh
$ perl -MLWP::Simple -e 'getprint("http://www.google.com/search?q=foobar");'
403 Forbidden <URL:http://www.google.com/search?q=foobar>
```
(maybe Google denies LWP or something, I don't know)
This is a kind of hurdle for beginners.

So I propose to use more stable web pages. 
e.g. http://www.w3.org/TR/html401/

This code works fine and the output is this:
```
1 This version:
2 Latest version of HTML 4.01:
3 Latest version of HTML 4:
4 Latest version of HTML:
5 Previous version of HTML 4.01:
6 Previous HTML 4 Recommendation:
7 Editors:
```