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)
MythDownloadManager: unlock m_infoLock before continuing after an error condition

Problem spotted by nouglywires on the forums.

(cherry picked from commit 8e6678a00f81fffcd8a3bf71947066db1fffbd30)
Don't use the CRIDs from the authority eventis.nl

they are not fit for our scheduler (multiple IDs per series/episode
and multiple series/episodes per ID)
(cherry picked from commit 494dfa6eef01aabe1ed7bf3d0f3139f20a8b7678)
draft patch to add support for private data specifiers and upc private data

Fixes #12091
(cherry picked from commit 30df98ce5d11b69d0b5c5114a9007cdfc79a7e9b)

Conflicts:

	mythtv/libs/libmythtv/test/test_mpegtables/test_mpegtables.h
MythUIImage: extend the random image feature to reload if a delay is used

If the <filename> is set to a directory and the <delay> is set to a value > 0
then keep reloading a random image from the directory after <delay>
milliseconds has passed.

For example this will display a random image from the themes 'background'
directory changing the image every minute (60000ms) :-

<imagetype name="background">
    <area>0,0,1280,720</area>
    <filename>backgrounds/</filename>
    <delay>60000</delay>
</imagetype>

(cherry picked from commit 78a827b8fdbf0d4fab4525a8007c2c8c7deb4cc1)
SSDP: Missed changes when reverting [52cb0b5]

Fixes #12333

(cherry picked from commit 3461b407b0dd0f4188108395709eb129ec32e652)
Clean up DVB-T2 patch.
Remove extra "true ||" which was added during development and should
have been removed.
Merge branch 'fixes/0.27' of git://github.com/MythTV/mythtv into fixes/0.27