| Description: | A simple link checking program that checks in parallel 
    pages of a site. 
    Options: 
     
    | -url | Start-URL |  | -foreign | 0 or 1, specifies, whether foreign links of 
                        local pages should be checked (default 1) |  | -local | A string match pattern to decide
                     which url should be treated as local
                     e.g.  -local *wu-wien.ac.at/*
                     Per default the locality filter is set
                     to the name of the host followed by '/*' |  | -restrict | 0 or 1,  sets the locality filter to the subtree
                     implied by the URL |  | -verbose | 0 or 1 or 2,  verbosity level (default 0) |  |