fix: correct typo in config

daemon/src/rtorrent.rc

@@ -8,7 +8,7 @@ method.insert = cfg.session,  private|const|string, /session/
 method.insert = cfg.logfile,  private|const|string, (cat,(cfg.tmp),"rtorrent.log")
 
 # Listening port for incoming peer traffic
-network.port_range.set = (system.env,RT_MIN_PORT)-(system.env,RT_MAX_PORT)
+network.port_range.set = (cat,(system.env,RT_MIN_PORT),"-",(system.env,RT_MAX_PORT))
 network.port_random.set = no
 
 # Distributed Hash Table and Peer EXchange