improve session check security by just searching for sid=@xxx@

limit the update-check.cgi to parse for cmd=download and not parse ar…

…bitrary query string options.

version bump

implemented a sessionID (sid) check for exec.cgi/exec1.cgi which checks

for a valid sessionID before executing any rega script code.
This fixes #4, thus CVE-2019-18939.

adapted certain things to match this repository style again.

Merge pull request #6 from jp112sdl/master

Changes made for CCU3 FW 3.53.26

next version

Addon Update Checker