add regression testing for #5166 , #5197 and #5241
test is actually related to Form instead of Fieldset class
Merge pull request #5274
Merge pull request #5274 in master
[http] Unify criteria for split name

Add missing Etag from #5302 c22ec11bf67f7d3f36edcd824ecdb26960c789d5
Merge branch 'Maks3w-hotfix/http-explode'

Close #5311
Close #5250
fix Debug::getEscaper() never called at dump() when xdebug is not loaded
Import Escaper as use statement
fix breaks the lazy load of getEscaper
fix cs