add non-standard port to HTTP_HOST
bug #10078 [BrowserKit] add non-standard port to HTTP_HOST server param (kbond)

This PR was submitted for the 2.3-dev branch but it was merged into the 2.3 branch instead (closes #10078).

Discussion
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[BrowserKit] add non-standard port to HTTP_HOST server param

| Q             | A
| ------------- | ---
| Bug fix?      | yes
| New feature?  | no
| BC breaks?    | no
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | https://github.com/Behat/MinkGoutteDriver/issues/25
| License       | MIT
| Doc PR        | n/a

This fix will allow using BrowserKit with php's webserver.

Commits
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5f25639 [BrowserKit] add non-standard port to HTTP_HOST