Si on vient de ton site (Header Referer == http://www.mypersonnaldata.eu/shaarli/), pour aller sur shaarli.callmematthi.eu, on arrive sur Rick Astley qui chante 'Never Gonna Give You Up'.

$ curl -i 'http://shaarli.callmematthi.eu/?anything' -H 'Host: shaarli.callmematthi.eu' -H 'User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:42.0) Gecko/20100101 Firefox/42.0' -H 'Accept: text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8' -H 'Accept-Language: en-US,en;q=0.5' --compressed -H 'Referer: http://www.mypersonnaldata.eu/shaarli/'

HTTP/1.1 301 Moved Permanently
Date: Fri, 11 Dec 2015 14:02:35 GMT
Server: Varnish
X-Varnish: 458813
Location: https://www.youtube.com/watch?v=dQw4w9WgXcQ
Content-Length: 0
Connection: keep-alive