[Freeciv-Dev] web page - tutorials/how2win.html is old (PR#1067)

[SAWADA Katsuya <amanatto@xxxxxxxxxxxxxxxx>]

tutorials/how2win.html page was not updated.

I think that page based on HOWTOPLAY file(distributed with the program).
I found some diff those files.

ex. 
tutorials/how2win.html:
Now that you have a city or two, you'll want to set the science rate
to 100%.

HOWTOPLAY:
Now that you have a city or two, you'll want to set the science rate
as high as your government type will allow.

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SAWADA Katsuya