Don't print local IPs (unless /showip is used)

On my machine I get 3 of these link-local addresses
for each of IPv4 and IPv6. I think only 1 of each type will even work
for LAN connections. So these logs seem to be of limited benefit to
users since one who has enough knowledge to know which one to use would
have known how to look it up anyway. Furthermore, this information can
make people hesitate to post logs due to concerns that they contain
sensitive information.

Author: slipher

src/engine/qcommon/net_ip.cpp

@@ -1507,8 +1507,6 @@ static void NET_GetLocalAddress()
 		}
 
 		freeifaddrs( ifap );
-
-		Sys_ShowIP();
 	}
 }
 
@@ -1564,8 +1562,6 @@ static void NET_GetLocalAddress()
 				NET_AddLocalAddress( "", search->ai_addr, ( struct sockaddr * ) &mask6 );
 			}
 		}
-
-		Sys_ShowIP();
 	}
 
 	if ( res )