Changelog (sincev4.2.0...v4.2.1)

• security #cve-2018-19790 [Security\Http] detect bad redirect targets using backslashes (@xabbuh)
• security #cve-2018-19789 [Form] Filter file uploads out of regular form types (@nicolas-grekas)
• bug[TwigBridge] Deprecating legacy Twig paths in DebugCommand and simplifications #29481 [TwigBridge] Deprecating legacy Twig paths in DebugCommand and simplifications (@yceruto)
• bug[Cache] Fixed Memcached adapter doClear()to call flush() #29436 [Cache] Fixed Memcached adapter doClear()to call flush() (@raitocz)
• bugFixes sprintf(): Too few arguments in MessageFormatter::choiceFormat #29482 Fixes sprintf(): Too few arguments in MessageFormatter::choiceFormat (@stephanedelprat)
• bug[Contracts] extract LocaleAwareInterface out of TranslatorInterface #29461 [Contracts] extract LocaleAwareInterface out of TranslatorInterface (@nicolas-grekas)
• bug[VarExporter] fix dumping private properties from abstract classes #29446 [VarExporter] fix dumping private properties from abstract classes (@nicolas-grekas)
• bug[Routing] ignore trailing slash for non-GET requests #29441 [Routing] ignore trailing slash for non-GET requests (@nicolas-grekas)
• bug[FrameworkBundle] Fix empty output for debug:autowiring when reflection-docblock is not installed #29445 [FrameworkBundle] Fix empty output for debug:autowiring when reflection-docblock is not installed (@chalasr)
• bug[Workflow] Fixed BC break for Workflow metadata #29444 [Workflow] Fixed BC break for Workflow metadata (@lyrixx)
• bug[DI] dont inline when lazy edges are found #29432 [DI] dont inline when lazy edges are found (@nicolas-grekas)
• bug[Serializer] fixed DateTimeNormalizer to maintain microseconds when a different timezone required #29413 [Serializer] fixed DateTimeNormalizer to maintain microseconds when a different timezone required (@rvitaliy)
• bug[Routing] fix taking verb into account when redirecting #29424 [Routing] fix taking verb into account when redirecting (@nicolas-grekas)
• bug[VarExporter] fix dumping protected property from abstract classes #29418 [VarExporter] fix dumping protected property from abstract classes (@nicolas-grekas)
• bug[DI] Fix dumping expressions accessing single-use private services #29414 [DI] Fix dumping expressions accessing single-use private services (@chalasr)
• bug[LDAP] Add TIMEOUT Option to LDAP Connection Options #28853 [LDAP] Add TIMEOUT Option to LDAP Connection Options (@lmatte7)
• bug[FrameworkBundle] define doctrine as default_pdo_provider only if the package is installed #29399 [FrameworkBundle] define doctrine as default_pdo_provider only if the package is installed (@nicolas-grekas)
• bug[Validator] AllowConstraintViolation::__toString() to expose codes that are not null or emtpy strings #29375 [Validator] AllowConstraintViolation::__toString() to expose codes that are not null or emtpy strings (@phansys)
• bug[EventDispatcher] Fix eventListener wrapper loop in TraceableEventDispatcher #29376 [EventDispatcher] Fix eventListener wrapper loop in TraceableEventDispatcher (@jderusse)
• bugundeprecate the single-colon notation for controllers #29386 undeprecate the single-colon notation for controllers (@fbourigault)
• bug[DI] fix edge case in InlineServiceDefinitionsPass #29393 [DI] fix edge case in InlineServiceDefinitionsPass (@nicolas-grekas)
• bug[Config] fix path exclusion during glob discovery #29394 [Config] fix path exclusion during glob discovery (@nicolas-grekas)
• bug[FrameworkBundle][Messenger] Restore check for messenger serializer default id #29395 [FrameworkBundle][Messenger] Restore check for messenger serializer default id (@ogizanagi)
• bug[Routing] fix greediness of trailing slash #29380 [Routing] fix greediness of trailing slash (@nicolas-grekas)