MFC r292603:

MFC r292603:

 If bootverbose is enabled every vnet startup and virtual interface
 creation will print extra lines on the console. We are generally not
 interested in this (repeated) information for each VNET. Thus only
 print it for the default VNET. Virtual interfaces on the base system
 will remain printing information, but e.g. each loopback in each vnet
 will no longer cause a "bpf attached" line.

git-svn-id: svn://svn.freebsd.org/base/stable/10@294501 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f