please add easier to use way to define name of flume node

I have some machines running flume, flume sees them as "machinename.domain.com" or "machinename", depending
on my entries in /etc/hosts , or whether I have a line "machinename" in the same line as /etc/hosts ,
or possibly what my network's local DNS server reports.

I can either start up a flume node with "flume node -n Name", or I can mess around with adding that parameter into the flume startup
script run by /etc/init.d/flume-node

It would be nice if there was a parameter I could define that would let me control the name of the node that is used by flume.

Maybe I want all of my machines to appears as 'machinename', maybe as 'machinename.domain.com', but I don't want a mix.

I think a good place for this parameter would be in /etc/sysconfig/flume-node for centos/redhat, or /etc/default/flume-node for debian/ubuntu.