Putting '--nameserver=N/A' in kickstart networking config line causes kickstart to hang

Issue

When creating a kickstart file with the following networking parameters for the "network" line; seen as the second nameserver was defined as "N/A", it caused kickstart to hang indefinitely:

network --bootproto static --device=eth0 --hostname=test.example.com --ip=x.x.x.x --netmask=x.x.x.x --gateway=x.x.x.x --nameserver=x.x.x.x,N/A --noipv6

When the kickstart is changed to have "--nameserver=10.10.0.19" or "--nameserver=10.10.0.19,10.10.0.21" on the network line, installation succeeds.