[vdr] eHD and how subtitle timing start work

[Vesa]

There has been several discussion about eHD dvb subtitle timing. Vdr 
works correctly on this area and time subtitles as they should be. 
Reelbox-plugin do not deliver timing info (STC) with default settings. 
The catch is soundcard support. For audio delay adjustment 
reelbox-plugin deliver STC. So just turn "Analog audio" to "Soundcard" 
and STC is delivered to VDR and subtitles are in time.

Only issue after this is with replaying recording, it will took some 
time to get STC to correct value. For this it would be nice to get min 
and max value for subtitle delay. If delay is out of those limits, vdr 
would use middle setting.

-- 
Vesa