merged branch romainneutron/file-binary-guesser (PR #7006)

This PR was merged into the 2.0 branch.

Commits
-------

a12744e Add dot character `.` to legal mime subtype regular expression

Discussion
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[HttpFoundation][2.0] Add dot character `.` to legal mime subtype regular expression

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| License       | MIT

For example, the following mimetype (used for Microsoft powerpoints) is not recognized given the current regexp : `application/vnd.ms-powerpoint; charset=binary`

src/Symfony/Component/HttpFoundation/File/MimeType/FileBinaryMimeTypeGuesser.php

@@ -62,7 +62,7 @@ class FileBinaryMimeTypeGuesser implements MimeTypeGuesserInterface
 
         $type = trim(ob_get_clean());
 
-        if (!preg_match('#^([a-z0-9\-]+/[a-z0-9\-]+)#i', $type, $match)) {
+        if (!preg_match('#^([a-z0-9\-]+/[a-z0-9\-\.]+)#i', $type, $match)) {
             // it's not a type, but an error message
             return null;
         }