Add a function to reload readers from oscam.server.

oscam: readers are reloaded on SIGHUP
WebIf: add a link to reload readers

This fixes ticket #498.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@9667 4b0bc96b-bc66-0410-9d44-ebda105a78c1
WebIf: add the link to reload the readers

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@9668 4b0bc96b-bc66-0410-9d44-ebda105a78c1