* Fix for OpenSSH pickiness about argument order to be able to use
  tap devices.
* Allow tun/tap devices to be used from index 0 as demonstrated in
  example config.
* Change arithmetic expressions.

Signed-off-by: Kimmo Vuorinen <kimmo.vuorinen@gmail.com>

This replaces the use of uci_validate_section() with
uci_load_validate(), which removes the need to declare local variables
for every config option.

This also fixes some validation, makes variable declarations local,
removes unnecessary curly brackets.

Signed-off-by: Jeffery To <jeffery.to@gmail.com>

This changeset removes the shell wrapper the package used previously,
and uses the instance-management abilities of procd to track ssh
processes. Many fixes and improvements were integrated from the
package maintainer's branch at

https://github.com/nunojpg/packages/tree/sshtunnel

Signed-off-by: Kiril Zyapkov <kiril.zyapkov@gmail.com>

Thanks to Avi Alkalay <avi@unix.sh>

Signed-off-by: Nuno Goncalves <nunojpg@gmail.com>

Signed-off-by: Nuno Goncalves <nunojpg@gmail.com>