siptrace: allow capturing on any port

reported by Eric Tamme from OnSIP

(cherry picked from commit b7f9ca3)

modules/siptrace/siptrace.c

@@ -2377,17 +2377,8 @@ static int pipport2su (str *sproto, str *ip, unsigned short port,
 		return -1;
 	}
 
-	if (port == 0) {
+	if (port == 0)
 		port = SIP_PORT;
-	}
-	else{
-	/*the address contains a port number*/
-		if (port<1024 || port>65535)
-		{
-			LM_ERR("invalid port number; must be in [1024,65536]\n");
-			return -1;
-		}
-	}
 	LM_DBG("proto %d, host %.*s , port %d \n",*proto, ip->len, ip->s, port);
 
 	/* now IPv6 address has no brakets. It should be fixed! */