[musicdb] more curl fixes
[network] - for judging if zeroconf is started evaluate the m_started flag instead of "IsInstantiated" (the latter always is true but doesn't mean the services are announced) - fixes #14302
changed: pass by const reference
changed: move static helpers to static functions
[musicdb] fix: unchecked access to albumartists/artists causes us to crash when they're empty
jsonrpc: fix return value of "volume" property in Application.GetProperties
VideoRenerers: add buffering
add buffering for GLES
WinRenderer: add buffering
DXVA: activate buffering in renderer
linuxrenderer: delete all textures on reconfigure
drop frame counter in application, ask render manager instead
vaapi: adopt to buffering in renderer
add buffering - some documentation
move NUM_BUFFERS up to BaseRenderer.h
OverlayRenderer: align buffers with index in renderManager
add buffering - submit absolute time to render buffers
RenderManager: some rework to buffering
dvdplayer: disable buffering unil dropping is improved
RenderManager: skip very late frames in render buffer