drop FreeBSD < 4 support
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54992 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Added by nobu (Nobuyoshi Nakada) about 9 years ago
drop FreeBSD < 4 support
The most recent version affected by this is 3.5 and was released
in 2000.
https://www.freebsd.org/releases/3.5R/announce.html
https://en.wikipedia.org/wiki/History_of_FreeBSD#Version_history
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@54992 b2dd03c8-39d4-4d8f-98ff-823fe69b080e