Add a Navigation Mode setting. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7254 91a5dbb7-01b9-0310-9b5f-b28072856b6e
Add a Speech Support setting. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7255 91a5dbb7-01b9-0310-9b5f-b28072856b6e
The current braille renderer reference should be flagged as volatile. (dm)


git-svn-id: svn://mielke.cc/main/brltty@7256 91a5dbb7-01b9-0310-9b5f-b28072856b6e