dvbapi: network mode: use one generic send function


git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@9857 4b0bc96b-bc66-0410-9d44-ebda105a78c1
Added documentation for new parameter 'httpoverwritebakfile'.

git-svn-id: http://streamboard.de.vu/svn/oscam/trunk@9858 4b0bc96b-bc66-0410-9d44-ebda105a78c1