CONFIG_UML_NET_DAEMON is not available for thedefaultarchitecture x86.
Result is shown for architecture um

Daemon transport (obsolete)

modulename: daemon.ko

configname: CONFIG_UML_NET_DAEMON

Linux Kernel Configuration
└─>UML Network Devices
└─>Daemon transport (obsolete)
In linux kernel since version 2.6.12  
This User-Mode Linux network transport allows one or more running
UMLs on a single host to communicate with each other, but not to
the host.

To use this form of networking, you'll need to run the UML
networking daemon on the host.

For more information, see
<http://user-mode-linux.sourceforge.net/old/networking.html> That site
has examples of the UML command line to use to enable Daemon
networking.

NOTE: THIS TRANSPORT IS DEPRECATED AND WILL BE REMOVED SOON!!! Please
migrate to UML_NET_VECTOR.

If unsure, say N.

source code: