[vdr] livebuffer patch improvements suggestions.

[Tommi Lundell]

Hello.

1) RAM is cheap now days. Can I use RAM to keep buffer data?
(System running from USB stick so only reason to start Hard Disk is when 
i use recordings)

2) Patch only record current channel. It would be nice if i can select 
channels from lists where buffers are active.
Example. i change channel and noticing that program what i want to look 
is already running so i simply press "jump backward" button and start to 
look program from beginning.
(2GB can keep about 100 minutes in buffers. If i select 5 different 
channels that i got 20mins buffer in every channel)

Regards: Tommi