lang/libhx: the port had been updated (+)
- Update libHX to version 4.2
- Sadly, the author no longer hosts the project on SourceForge but on his own site instead, this affects MASTER_SITES and WWW line in the port description
- Disable getsockopt(SO_BINDTODEVICE) call for now as FreeBSD does not implement this socket option (patches welcome)
- While here, assume maintainership of the port