Additional check before enabling ssh root login

In the CuBox-I XBian image, the default PermitRootLogin is `without-password`. Therefor enabling it in xbian-config doesn't work when we only check the `no` parameter. This commit checks for both `without-password` and `no` parameter and changes it to `yes`
Merge branch 'CurlyMoo-patch-1'
[modules/sshroot/functions] Don't bother with ifs.