sapserver.cpp,sap.cfg

IPv6 SAP support. Not very useful at the moment since VLC doesn't
support it, however.
It will only work for link-local streaming at the moment,since the SAP
address depends on the prefix, but it will be the more likely case.
You now have the ipversion= configuration option (6 for IPv6,anything
else for ipv4).

* Makefile: Use intelligent compilation and compilation options

* all: check system calls and take the appropriate action

* parser.cpp , parser.h , sapserver.cpp: -s option to display dots.