Changed style of auth error.


git-svn-id: http://observium.org/svn/observer/trunk@4283 61d68cd4-352d-0410-923a-c4978735b2b8
Allow to ignore existing rrd dir when want add device.


git-svn-id: http://observium.org/svn/observer/trunk@4284 61d68cd4-352d-0410-923a-c4978735b2b8