default user overrides per-host user specification

[Andy Spiegl]

if .csshrc looks like this:
--------------------------------
user = admin
tag1 = root@machine1
clusters = tag1
--------------------------------

then "cssh tag1" connects to "machine1"
as user "admin" instead of as user "root".

This unwanted behaviour started after the upgrade von oneiric to precise.
Thanks!

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: clusterssh 4.00.11-2
ProcVersionSignature: Ubuntu 3.2.0-26.41-generic 3.2.19
Uname: Linux 3.2.0-26-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu10
Architecture: amd64
Date: Fri Jun 29 12:02:57 2012
PackageArchitecture: all
ProcEnviron:
 SHELL=/bin/zsh
 TERM=xterm
 PATH=(custom, user)
 LANG=de_DE.UTF-8
 LANGUAGE=de_DE.UTF-8
SourcePackage: clusterssh
UpgradeStatus: Upgraded to precise on 2012-06-22 (6 days ago)