Set initial timezone as on host if host has Debian-like or RHEL-like OS.

Other OSes can be added easily by using more elif statements.

The method used is a more higher level "dpkg-reconfigure -f noninteractive tzdata", which sets /etc/localtime according to /etc/timezone file. So the idea is just to copy simple REGION/CITY pair to container's timezone file.

Signed-off-by: funditus funditus@mail.ru