redis cache: make MaxIdle configurable

Update Documentation in Output.go

Fix Documentation for HTTP status codes descriptions.

Fix #2975

修复AccessLog输出会多换一行的bug

update log.go add GetLevel Function to Log

fix a typo

1.9.2

Add lock while releasing session

Proposal to #2952

Change the type of HTTPMETHOD

Solve the problem of SessionRead failure while ReleaseSession is in progress

test: Improve test case for utils/safemap, make it 100% cover

add report card to readme.md

fix golint comments

to close issue #1899(redis cache doubt)

Fix run controller if it set by RumController and RunMethod in Filterfunc

Make parent process exit gracefully.

validation: fix ErrorMap, added AddError(key, message)

Add JSON or Apache access log formatting option to config:  AccessLogsFormat = JSON_FORMAT or APACHE_FORMAT  ref #2738

Add the ability to unregister fixed routes

Add sys env feature 

add Enum field to Schema

1.Add Mutual HTTPS  Option!