[CEC] Added support for CEC buttons introduced by HDMI 1.4
      - CONTENTS_MENU
      - ROOT_MENU
      - TOP_MENU
      - DVD-MENU
      (Requires at least libcec 2.2.0)
[jenkins] - when trying to determine the branchname of a detached head revision - filter it so only branches from the currently built GITHUB_REPO are used (else we might pick the wrong branchname from another repo which was checked out before and contains the same revision)
Merge pull request #5659 from Memphiz/fixjenkinsremotes

[jenkins] - fix wrong branchnames at times
Merge pull request #5628 from ksooo/cec-hdmi-1-4-buttons
[rbp/omxplayer] When opening a stream don't try to update gui so often
[ffmpeg] Speed up wtv index creation

The index creation is O(N^2) with number of entries (typically thousands).
On a Pi this can take more than 60 seconds to execute for a recording of a few hours.

By replacing with an O(N) loop, this takes virtually zero time
adds GetTvShowSeasons
move AddSeason() public.
adds GetArt function to (video) scraper, allowing art to be fetched given the video identifier.
refresh season art if a new season is found that isn't recorded in the database yet. Fixes #14339
REMOVEME: updated thetvdb.com scraper to support art updates
[omx] Report decoded image name
logging: Add microsecond timer to log messages
videoplayer: adapt lateness detection and dropping to buffering
video player: present correct pts to user for a/v sync (after buffering in renderer)
videoplayer: update frametime, it might change due to fps detection
[hifiberry] Hack: force it to be recognised as IEC958 capable to enable passthrough options
Move the reference-counting of Begin and End calls from DX and GL source files into GUIFontTTF.cpp.
Convert CGUIFontTTFBase::m_vertex to be managed as a std::vector.

Also retired CGUIFontTTFBase::m_vertex_count and
CGUIFontTTFBase::m_vertex_size because these can be derived from vector
member functions.
CGUIFontTTFBase::RenderCharacter can now append to arbitrary vectors of vertices rather than only CGUIFontTTFBase::m_vertex