[NOP] Updated URLs

Went through the URLs and updated them when necessary and possible;
deleted them otherwise.

Change-Id: I76506d26e3ebecc5507c4272c845000b4f56c534
Reviewed-on: http://saros-build.imp.fu-berlin.de/gerrit/1418
Tested-by: Jenkins CI
Reviewed-by: Franz Zieris <zieris@inf.fu-berlin.de>