[PATCH] Open configuration file for reading

This patch opens configuration file for reading only, allows to
use file which names starts with special character, like '<', and
prevents from opening malicious file like '>/etc/passwd'.

Thanks to Florian Weimer for spotting it.

Signed-off-by: Chris 'BinGOs' Williams <chris@bingosnet.co.uk>
Update CHANGES and bump to 0.08