seloger: Fix pagination

Right now webservices of seloger.com have a bug and returns an
invalid URL for next page (http://ws.seloger.com/http://ws.seloger.com/search.xml

).

Work around that by deleting everyting before the last "http://" in the
URL.

Signed-off-by: Simon Lipp <laiquo@hwold.net>