[#3232] Fixing note about expressions with parameters thanks to @WouterJ
Tried to clarify #3255
Merge pull request #3243 from xabbuh/fix-build-errors

Fix build errors
Replace gendered pronouns with gender-neutral

For consistency sake, instances of "he", "she", "his", "hers",
"his/hers", "he/she", etc were replaced with "they", "their", etc (or
were removed all together in cases where they weren't necessary). Verb
tenses should also have been corrected where changes were made.
Merge pull request #3245 from bicpi/fix_front_controller_code

[Cookbook][Configuration] Fix front controller sample codes
[#3245] Removing most of the front controller code altogether

This removes code that could easily become out of date again. Also, I don't think
it was necessary - we want to focus them on only one line anyways.
Merge pull request #3246 from bicpi/fix_statement

[Cookbook][Console] Fix statement
Merge pull request #3247 from bicpi/update_minifier_recommendation

[Cookbook][Assetic] Update JS minifier recommendation
Merge pull request #3249 from bicpi/improve_ISO_references

Improve ISO references
Merge pull request #3250 from bicpi/asterisk_alternative_for_required_form_fields

[Cookbook][Forms] Add Asterisk alternative using CSS
[#3250] Lowercasing asterisk
Merge pull request #3253 from sstok/path-3

[reference] fixed wrong class reference in form/types/locale.rst
Merge pull request #3254 from WouterJ/fix_link

Fixed link syntax
Merge branch '2.2' into 2.3

Conflicts:
	cookbook/configuration/environments.rst
	reference/forms/types/locale.rst
Merge branch '2.3' into 2.4

Conflicts:
	book/security.rst
	components/security/authentication.rst
	components/translation/introduction.rst
[#3022] Adding framework documentation for routing expressions
[#3022] Adding new Expression validation constraint
[#3022] Adding all of the security-related expression functionality docs
[#3022] Adding a quick cookbook entry to highlight where the expression component is used in the framework
[#3022][#3258] Tweaks thanks to @cordoval