Copy head@r302406 to stable/11 as part of the 11.0-RELEASE cycle.Prune svn:mergeinfo from the new branch, as nothing has been mergedhere.Additional commits post-branch will follow.Approved by: re (implicit)Sponsored by: The FreeBSD Foundation
Use PC Card instead of other variants in the driver man pages.
Fixed cross references to pccbb(4), fixed spelling of "device cbb",and linked the pccbb(4) manpage to cbb(4).Reviewed by: imp
mdoc(7) police: Nits.
Explain what exca is.