Don't use set() since it's not in python 2.3.

Just use a plain list instead.  Technically probably slightly worse
asymptotic behaviour, but it's not like we'll have a million sockets anyway.

server.py

@@ -158,9 +158,9 @@ def main():
             if rpid:
                 raise Fatal('hostwatch exited unexpectedly: code 0x%04x\n' % rv)
         
-        r = set()
-        w = set()
-        x = set()
+        r = []
+        w = []
+        x = []
         handlers = filter(lambda s: s.ok, handlers)
         for s in handlers:
             s.pre_select(r,w,x)
@@ -169,10 +169,10 @@ def main():
                   mux.fullness, mux.too_full))
         (r,w,x) = select.select(r,w,x)
         #log('r=%r w=%r x=%r\n' % (r,w,x))
-        ready = set(r) | set(w) | set(x)
+        ready = r+w+x
         for s in handlers:
             #debug2('check: %r: %r\n' % (s, s.socks & ready))
-            if s.socks & ready:
+            if list_contains_any(s.socks, ready):
                 s.callback()
         mux.check_fullness()
         mux.callback()