install init.d files on GNU/kFreeBSD

install init.d files on GNU/kFreeBSD

Review: https://reviewboard.asterisk.org/r/4118/
........

Merged revisions 426926 from http://svn.asterisk.org/svn/asterisk/branches/1.8
........

Merged revisions 426927 from http://svn.asterisk.org/svn/asterisk/branches/11
........

Merged revisions 426933 from http://svn.asterisk.org/svn/asterisk/branches/12
........

Merged revisions 426934 from http://svn.asterisk.org/svn/asterisk/branches/13

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@426935 65c4cc65-6c06-0410-ace0-fbb531ad65f3