dhclient in the installer does not support rfc3442-classless-static-routes

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Issue

Dracut DHCP is failing to recognize rfc3442-classless-static-routes option. It occurs only when DHCP booting on network is offering only classless static routes.

Environment

Red Hat Enterprise Linux 7
Version-Release number of selected component:
RHEL-7.3 installer (rhel-server-7.3-x86_64-dvd.iso)

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