Yasso更新大改动，更新扫描方式，去除不常用功能，增加指纹和协议识别，修补bug等

core/plugin/postgres.go

@@ -0,0 +1,22 @@
+package plugin
+
+import (
+	"Yasso/config"
+	"database/sql"
+	"fmt"
+	"time"
+)
+
+func PostgreConn(info config.ServiceConn, user, pass string) (bool, error) {
+	var flag = false
+	db, err := sql.Open("postgres", fmt.Sprintf("postgres://%v:%v@%v:%v/%v?sslmode=%v", user, pass, info.Hostname, info.Port, "postgres", "disable"))
+	if err == nil {
+		db.SetConnMaxLifetime(time.Duration(info.Timeout))
+		defer db.Close()
+		err = db.Ping()
+		if err == nil {
+			flag = true
+		}
+	}
+	return flag, err
+}