UFS fixes and workarounds for when pkgng is broken

- Always copy /etc/resolv.conf into the jail
- Redirect pkgng stderr to /dev/null
- pkg info -oF output in the past used ':' as the delimiter, now it is
  using a space, so cut on both delimiters
- Configre the reletive path of the CDN correctly
- Verify a pkg rquery works and upgrade the pkgng repo if it fails