The "url" kickstart command is not supported anymore.
It seems like a real step backwards to only have NFS available,
especially when HTTP is an option in the interactive install.
Please add it again. This is RH support incident #I2151584.
This is not a bug; HTTP/FTP were never meant to be supported in kickstart
installations. Am adding this to a features request list for latest releases.
ftp and http kickstarts have been added for the next release