This PR was merged into the 4.1-dev branch.Discussion----------[Validator] Html5 Email ValidationCurrently we only support a very loose validation. There is now astandard HTML5 element with matching regex. This will add the abilityto set a `mode` on the email validator. The mode will change thevalidation that is applied to the field as a whole.These modes are:* loose: The pattern from previous Symfony versions (default)* strict: Strictly matching the RFC* html5: The regex used for the HTML5 ElementDeprecates the `strict=true` parameter in favour of `mode='strict'`| Q             | A| ------------- | ---| Branch?       | master| Bug fix?      | no| New feature?  | yes| BC breaks?    | no| Deprecations? | yes| Tests pass?   | yes| Fixed tickets |#21531| License       | MIT| Doc PR        |symfony/symfony-docs#8487<!--- Bug fixes must be submitted against the lowest branch where they apply  (lowest branches are regularly merged to upper ones so they get the fixes too).- Features and deprecations must be submitted against the 3.4,  legacy code removals go to the master branch.- Please fill in this template according to the PR you're about to submit.- Replace this comment by a description of what your PR is solving.-->Commits-------cf04108 [Validator] Html5 Email Validation

This PR was merged into the master branch.Discussion----------[Validator] Html5 Email ValidationAdd documentation about the new mode parameter. Adds descriptions forthe 'loose', 'strict', and 'html5' options.Relates tosymfony/symfony#24442Commits-------07d4bf9 [Validator] Html5 Email Validation