blue-tether: Fix reading reconnect value from config file
blue-tether: Fix reading reconnect value from config file

We weren't casting it to an int. I've tried to handle this in a generic
way that will allow other int options to automatically convert.

Not entirely sure if the convert_value function is stable - it's not
mentioned in the documentation, but it also isn't preceded by an
underscore.

Signed-off-by: Ian Munsie <ce389fd2fa887d610219cb85dea6dc9451973e74@gmail.com>

DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk,DarkStarSword/junk