Fix a logical bug.

"not" has higher precedence over "and" operator. So, expression "not x and y" != "not x or not y".

The target is to check if any of the addr and port are invalid, but the current expression is true when addr is invalid but port is valid.

web/net.py

@@ -126,7 +126,7 @@ def validip(ip, defaultaddr="0.0.0.0", defaultport=8080):
             raise ValueError(':'.join(ip) + ' is not a valid IP address/port')
     elif len(ip) == 2:
         addr, port = ip
-        if not validipaddr(addr) and validipport(port):
+        if not validipaddr(addr) or not validipport(port):
             raise ValueError(':'.join(ip) + ' is not a valid IP address/port')
         port = int(port)
     else: