netutils: make ping working for confined users

http://mgrepl.fedorapeople.org/F15/admin_netutils.patch

* ping did not work for confined users which is fixed by these changes
* allow netutils to read network state information and request the
kernel to load a module

Hello Miroslav !

I have tested ping and traceroute from:

http://www.skbuff.net/iputils/iputils-s20101006.tar.bz2

and they appear to be working fine for confined users with the latest reference policy (provided that ping is setuid root, which is needed for opening a raw socket).

Also, I do not suggest that you move files_read_usr_files(traceroute_t)
further up and away from its "nmap-commented" block. For example, I got
immediately confused, I went looking into traceroute source code and couldn't find anything that it needs to do with usr files... What would be very nice there is a boolean for the whole nmap-related block.

Is this series of messages just an acknowledgement of what is being done on Fedora 15 ? I suppose it is so, as dev_write_usbmon_dev() does not make sense in refpolicy.

Regards,

Guido