/usr/bin/turnutils_stunclient: invalid option -- '-'
Usage: stunclient [options] address
Options:
        -p      STUN server port (Default: 3478)
        -L      Local address to use (optional)
        -f      Force RFC 5780 processing
        -c      Continuously send binding requests and report latency
        -i      Interval between continuous requests in milliseconds (Default: 1000)
        -t      Response timeout in milliseconds (Default: 3000)