SSDP: Check that the peer address is available before doing the local network check.

Refs #12305

(cherry picked from commit d20c163ee82c38f9d8fe4652b7a811af61925de7)
Properly translate star ratings in XMLTV parser.

Convert from zero based star-ratings in XMLTV to one based star-ratings
in MythTV.
(cherry picked from commit c12af87629629295975fdb1ede28072ad2fc1247)
SSDP: Disable reflection attack mitigation for now, it's triggering false positives.

(cherry picked from commit 02e92a265c1e9825bb58806156fbf31bd740515a)
fix braino in c12af87
(cherry picked from commit 0f7d7ff0660a12022b76cdb8d6d6bceda032f540)
Merge branch 'fixes/0.27' into stable/0.27