Added load balancer module

- Added load balancer module wip
- Updated geoipv4
- Reduced uptime timeout to 5 sec
- Optimized rate limit implementation
- Fixed minor UI bug in stream proxy

src/mod/dynamicproxy/loadbalance/loadbalance.go

@@ -0,0 +1,60 @@
+package loadbalance
+
+import (
+	"imuslab.com/zoraxy/mod/geodb"
+	"imuslab.com/zoraxy/mod/info/logger"
+	"imuslab.com/zoraxy/mod/uptime"
+)
+
+/*
+	Load Balancer
+
+	Handleing load balance request for upstream destinations
+*/
+
+type BalancePolicy int
+
+const (
+	BalancePolicy_RoundRobin BalancePolicy = 0 //Round robin, will ignore upstream if down
+	BalancePolicy_Fallback   BalancePolicy = 1 //Fallback only. Will only switch to next node if the first one failed
+	BalancePolicy_Random     BalancePolicy = 2 //Random, randomly pick one from the list that is online
+	BalancePolicy_GeoRegion  BalancePolicy = 3 //Use the one defined for this geo-location, when down, pick the next avaible node
+)
+
+type LoadBalanceRule struct {
+	Upstreams         []string      //Reverse proxy upstream servers
+	LoadBalancePolicy BalancePolicy //Policy in deciding which target IP to proxy
+	UseRegionLock     bool          //If this is enabled with BalancePolicy_Geo, when the main site failed, it will not pick another node
+	UseStickySession  bool          //Use sticky session, if you are serving EU countries, make sure to add the "Do you want cookie" warning
+
+	parent *RouteManager
+}
+
+type Options struct {
+	Geodb         *geodb.Store    //GeoIP resolver for checking incoming request origin country
+	UptimeMonitor *uptime.Monitor //For checking if the target is online, this might be nil when the module starts
+}
+
+type RouteManager struct {
+	Options Options
+	Logger  *logger.Logger
+}
+
+// Create a new load balance route manager
+func NewRouteManager(options *Options, logger *logger.Logger) *RouteManager {
+	newManager := RouteManager{
+		Options: *options,
+		Logger:  logger,
+	}
+	logger.PrintAndLog("INFO", "Load Balance Route Manager started", nil)
+	return &newManager
+}
+
+func (b *LoadBalanceRule) GetProxyTargetIP() {
+
+}
+
+// Print debug message
+func (m *RouteManager) debugPrint(message string, err error) {
+	m.Logger.PrintAndLog("LoadBalancer", message, err)
+}