nice check – some improvements needed

Hi,

a) s3 backup check works mostly out of the box
“Problem”. sudo rights needs “ALL” or full path
/usr/bin/duply to work

b) ssh backup creates STDERR output:

# duply `hostname` status >/dev/null
ssh: Connected (version 2.0, client OpenSSH_5.5p1)
ssh: Authentication (publickey) successful!
ssh: Secsh channel 1 opened.
ssh: [chan 1] Opened sftp connection (server version 3)
which needs to be filtered/ignored.
( I try to post here later a fix for it).

Bests