This fixes the issue that a simple port range should map to a random
port range from the host to the container, if no host port range is
specified. For example this fails without applying the patch:
```
> podman run -it -p 6000-6066 alpine
Error: cannot listen on the TCP port: listen tcp4 :53: bind: address already in use
```
The issue is that only the first port is randomly chosen and all
following in the range start by 0 and increment. This is now fixed by
tracking the ranges and then incrementing the random port if necessary.
Signed-off-by: Sascha Grunert <sgrunert@suse.com>
49424fc02a