MFC r316721 r331274

MFC r316721 r331274

Most wireless drivers don't support altq(4).

Extend the description of ALTQ to call it a system which is a framework in
altq(4) to match altq(9). This makes preserving the history section as the
author of ALTQ easier in the history section, rather than calling it a framework
in the description & a system in the history.
Add a history section to altq(4) and extend the history section in altq(9)

git-svn-id: svn://svn.freebsd.org/base/stable/10@331512 ccf9f872-aa2e-dd11-9fc8-001c23d0bc1f