[collectd] collectd 4.1.0 available

[Thorsten von Eicken]

Florian, first of all: thanks for an awesome program!
I just started to build a web interface around 4.0.6 and I see very
interesting changes in 4.1.0, in particular the flexible sampling rate.
However, I could find any information on compatibility. Can a 4.0.6
client talk to a 4.1.0 server? And vice-versa? I think it's very
important that the server be backwards compatible with older clients. Do
you have a stated policy for that?
Thanks much!
	Thorsten