linkfixes: don't touch links inside of web archive templates
in links such as
{{Webarchiv | url=http://www.taz.de/!699865/ | wayback=20170204085000 | text=''Warte, bis es dunkel wird''}}
(see https://de.wikipedia.org/wiki/Spezial:Diff/214376090)
no "correction" of links should be made, because otherwise a link might not be reachable.