upnp enabled by default like in qmake project

src/makefile.unix

@@ -5,7 +5,7 @@
 # :=0 --> UPnP support turned off by default at runtime
 # :=1 --> UPnP support turned on by default at runtime
 # :=- --> No UPnP support - miniupnp not required
-USE_UPNP:=0
+USE_UPNP:=1
 
 # :=1 --> Enable IPv6 support
 # :=0 --> Disable IPv6 support

src/net.cpp

@@ -1102,7 +1102,7 @@ void ThreadMapPort()
             }
         }
 
-        string strDesc = "Bitcoin " + FormatFullVersion();
+        string strDesc = "twister " + FormatFullVersion();
 
         try {
             loop {