[vdr] Self diagnosis

[Christian Berger <einStein@donau.de>]

Servus

Well I have an idea. With the "cannot_sync" entries in the syslog and
the channel.conf file we might generate statistics which might give
valueable information on recieving problems. For example of all channels
of a certain polarisation fail, we could find out the error faster. It
would be great if we would have data on signal strength and signal to
noise ratio as well as humidity. If we detect a probable problem, we can
issue a warning.

Servus
  Casandro