Fix APOP.
See: http://lists.ccil.org/pipermail/fetchmail-friends/2003-October/008080.html

$OpenBSD: patch-driver_c,v 1.1 2004/03/12 00:18:42 fgsch Exp $
--- driver.c.orig	2003-10-15 16:22:31.000000000 -0300
+++ driver.c	2004-03-11 21:10:10.000000000 -0300
@@ -429,7 +429,7 @@ static int fetch_messages(int mailserver
 	/* for POP3, we can get the size of one mail only! Unfortunately, this
 	 * protocol specific test cannot be done elsewhere as the protocol
 	 * could be "auto". */
-	if (ctl->server.protocol == P_POP3)
+	if (ctl->server.protocol == P_POP3 || ctl->server.protocol == P_APOP)
 	    fetchsizelimit = 1;
 
 	/* Time to allocate memory to store the sizes */
