- Make last patch smart that is use /dev/shm for temporary file
descriptors

- Add a workaround for filled /tmp file systems (bnc#786134)
- Check for subshell if tmp file can be used otherwise use a
a pipe (bnc#786134)
- Restore shell variables before any outpur will be placed in
a temp file or buffer (bnc#786134)

- Be able to export justified and zerofilled variables (bnc#785360)
- This requires that variables with this attributes should be really
cleared if unset