upgrade jQuery scripts

jQuery 1.9.0 had a bug in replaceWith() that got fixed in 1.9.1 - to
ensure compatibility I upgraded the whole suite to their current
releases.
Brazilian Portuguese language update
Korean language update
German (informal) language update
stream select parameters need to be reset for each call
don't send empty cookie header
Merge branch 'master' of https://github.com/splitbrain/dokuwiki