增加ip_plus类型表，可以支持范围和掩码两种描述IP和端口的方式。

test/table_info.conf

@@ -1,7 +1,7 @@
 #each collumn seperate with '\t'
 #id	(0~65535)
 #name string
-#type one of ip,expr,expr_plus,digest,intval,compile or plugin
+#type one of ip, ip_plus, expr, expr_plus, digest, intval, compile or plugin
 #src_charset one of GBK,BIG5,UNICODE,UTF8
 #dst_charset combined by GBK,BIG5,UNICODE,UTF8,seperate with '/'
 #do_merege [yes/no]
@@ -34,4 +34,5 @@
 15	IR_INTERCEPT_IP plugin  {"valid":14,"tag":18}
 16	APP_PAYLOAD	expr_plus	UTF8	UTF8	yes	0	quickoff
 17	TROJAN_PAYLOAD	expr	UTF8	UTF8	yes	0	quickoff
-18	MAIL_ADDR	expr	UTF8	UTF8	yes	0	quickoff
+18	MAIL_ADDR	expr	UTF8	UTF8	yes	0	quickoff
+19	IP_PLUS_CONFIG	ip_plus	--