Version 1.7.14 fixed can not set redis maxIdle & maxActive when use redis session, fix for issue #236

[devfeel]

• fix: fixed can not set redis maxIdle & maxActive when use redis session, fix for issue Session在Redis存储模式下不支持MaxActive、MaxIdle等参数设置，默认设置在并发场景下导致Session读取为空 #236
• refactor: add StoreConfig.MaxIdle & StoreConfig.MaxActive set redis maxIdle & maxActive
• refactor: add redisutil.GetDefaultRedisClient to returns the RedisClient of specified address
• refactor: update redisutil.GetRedisClient returns the RedisClient of specified address & maxIdle & maxActive
• opt: set defaultMaxIdle=10, defaultMaxActive=50 when use default redis config
• How to set redis maxIdle & maxActive when use redis session:

sessionConf := session.NewDefaultRedisConfig("redis://xx.xx.xx.xx:6379/0")
sessionConf.BackupServerUrl = "redis://xx.xx.xx.xx:6379/0"
sessionConf.CookieName = "dotweb-example.SessionID"
sessionConf.MaxIdle = 20
sessionConf.MaxActive = 100

• 2020-12-19 21:00 at ShangHai