Previously our dhclient-script expected that $new_classless_static_routes
will have all values separated by a whitespace. But at least on F25
dhclient will put there the destination descriptor in the same format
as it is used by ISC dhcp-server.
For example:
new_classless_static_routes=32.10.198.122.47 192.168.78.4
while our current code expects
new_classless_static_routes=32 10 198 122 47 192 168 78 4
So let's just accept both of these formats by adding "." to IFS.
For details plesse see https://tools.ietf.org/html/rfc3442
"Classless Route Option Format"
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