links lang display: leave it to the css
correct regexp for extracting cookies

previous regexp was not ok in some cases. Expecially it
would fail if there was no ending semicolon
on_the_web section folding

- correctly assert default status if no pref is assigned
- move script tag, so it won't break fold.js code which checks next() visibility
style
execute regexp only once
hreflang is entirely handled by css
doubled links

fixes #859