Delete MAKEDEV references and add small blurb that points to devfs(5) and devd(8).
Delete MAKEDEV references and add small blurb that points to devfs(5)
and devd(8).

PR:		docs/50278
Submitted by:	Sergey A.Osokin <osa@FreeBSD.org.ru>

jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase,jrobhoward/SCADAbase