Comment 8 for bug 1099783

netstat -nltp sometimes can not output pid/progname, like
```
tcp 0 0 0.0.0.0:10033 0.0.0.0:* LISTEN -
tcp6 0 0 :::10033 :::* LISTEN -
```

so we can't detect whether port has been taken by this rsync process or not.

seems lsof is much reliable. so we change to lsof for all platforms

http://bazaar.launchpad.net/~codership/codership-mysql/wsrep-5.5/revision/3980
http://bazaar.launchpad.net/~codership/codership-mysql/5.6/revision/4075