Fix Debian init scripts and watchdog installation issues

- Fixed wssshd.init and wssshc.init to work on Debian/Ubuntu systems
- Changed function library from Red Hat (/etc/rc.d/init.d/functions) to Debian (/lib/lsb/init-functions)
- Replaced Red Hat echo_success/echo_failure functions with simple echo statements
- Added watchdog script installation to both wsssh-server and wssshtools debian/rules
- wssshd-watchdog now installs to /usr/sbin/wssshd-watchdog
- wssshc-watchdog now installs to /usr/sbin/wssshc-watchdog
- Fixed init script compatibility issues that were causing 'command not found' errors
- Ensured proper service management on Debian-based systems
- Resolved missing watchdog script errors during service startup