CStatElement with join bugfix
Adding CHANGELOG line
Better CFileLogRoute performance
Merge pull request #1917 from and-ers/master

array_push optimizations (reverse-merged from commit 157ff017a0776503658b94a8520a2db3ffda9315)
Backported CFileLogRoute code from Yii2
CHANGELOG fixes
Merge remote-tracking branch 'upstream/master' into stat-relation-bugfix

Conflicts:
	CHANGELOG
Merge pull request #2049 from Yiivgeny/stat-relation-bugfix

CStatElement with join bugfix