Merge branch '3.4' into 4.0

* 3.4:
  [Intl] Fixed the broken link
  Fix typo
  Fix typo
  Fixed issue #25985
  Don't show wanna-be-private services as public in debug:container
  [Routing] Fix trailing slash redirection for non-safe verbs
  [DI] Fix tracking of source class changes for lazy-proxies
  Proxy class names should be deterministic and independent of spl_object_hash() which is somewhat random
  [Debug] Fix bad registration of exception handler, leading to mem leak
  [Form] Fixed empty data on expanded ChoiceType and FileType
  collect extension information as late as possible

Author: Robin Chalas

README.md

@@ -5,7 +5,7 @@ A PHP replacement layer for the C intl extension that also provides access to
 the localization data of the ICU library.
 
 The replacement layer is limited to the locale "en". If you want to use other
-locales, you should [install the intl PHP extension] [0] instead.
+locales, you should [install the intl PHP extension][0] instead.
 
 Resources
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