fix link [skip ci]
Merge pull request #4157 from Ragazzo/migration_template_fixed

migration fixed
Russian translate concept-service-locator.md

Added Russian translate docs\guide-ru\concept-service-locator.md
Merge pull request #4159 from qiansen1386/patch-11

fix link [skip ci]
Merge pull request #4158 from hubunator/master

[skip ci] Added missing translation in Polish
minor fix [skip ci]
fix typo in phpdoc of yii\redis\Connection [skip ci]
Merge pull request #4161 from IndeedPlusPlus/patch-1

fix typo in phpdoc of yii\redis\Connection [skip ci]
Fixes #3992
Fixes #4147
Merge branch 'master' of git://github.com/yiisoft/yii2
Fixes #4135
translate concept-aliases and autoloading [skip cii]
Added unit tests for Widget\ActiveField
fixes #1160
Correction semantic error

Correction semantic error on line 11.
Update QueryParamAuth.php

translate exception message
Merge pull request #4167 from raeef-refai/patch-1

Update QueryParamAuth.php
Guide-zh-CN intro-upgrade-from-v1.md proofread.
Merge pull request #6 from AbrahamGreyson/master

Guide-zh-CN intro-upgrade-from-v1.md proofread.
Guide-zh-cn/start-installation.md proofread.