update config to change section . to ::

@@ -154,7 +154,7 @@ func (c *IniConfigContainer) Set(key, value string) error {
 
 	var section, k string
 	key = strings.ToLower(key)
-	sectionkey := strings.Split(key, ".")
+	sectionkey := strings.Split(key, "::")
 	if len(sectionkey) >= 2 {
 		section = sectionkey[0]
 		k = sectionkey[1]
@@ -184,7 +184,7 @@ func (c *IniConfigContainer) getdata(key string) string {
 
 	var section, k string
 	key = strings.ToLower(key)
-	sectionkey := strings.Split(key, ".")
+	sectionkey := strings.Split(key, "::")
 	if len(sectionkey) >= 2 {
 		section = sectionkey[0]
 		k = sectionkey[1]

@@ -69,13 +69,13 @@ func TestIni(t *testing.T) {
 	if iniconf.String("name") != "astaxie" {
 		t.Fatal("get name error")
 	}
-	if iniconf.String("demo.key1") != "asta" {
+	if iniconf.String("demo::key1") != "asta" {
 		t.Fatal("get demo.key1 error")
 	}
-	if iniconf.String("demo.key2") != "xie" {
+	if iniconf.String("demo::key2") != "xie" {
 		t.Fatal("get demo.key2 error")
 	}
-	if v, err := iniconf.Bool("demo.caseinsensitive"); err != nil || v != true {
+	if v, err := iniconf.Bool("demo::caseinsensitive"); err != nil || v != true {
 		t.Fatal("get demo.caseinsensitive error")
 	}
 }