[HttpFoundation] renamed hostname to host in the test to be consistent
[Validator] fixed phpdoc
renamed hostname to host in the routing system (closes #6775)

As explained in #6775, this has been done for the following reasons:

1. It's also Request::getHost()
2. The term hostname has been obsoleted in
http://tools.ietf.org/html/rfc3986#appendix-D.2 and uses the host only
3. hostname in the RFC was defined as the registered domain name, but we
probably also want to match IP-Adresses with the pattern which is the
host = IP-literal / IPv4address / reg-name for.
merged branch fabpot/hostname-rename (PR #6825)

This PR was merged into the master branch.

Commits
-------

94f6116 renamed hostname to host in the routing system (closes #6775)
001734a [Validator] fixed phpdoc
18b9e68 [HttpFoundation] renamed hostname to host in the test to be consistent

Discussion
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Hostname rename to host

| Q             | A
| ------------- | ---
| Bug fix?      | no
| New feature?  | no
| BC breaks?    | no (does not exist in 2.1)
| Deprecations? | no
| Tests pass?   | yes
| Fixed tickets | #6775
| License       | MIT
| Doc PR        | symfony/symfony-docs#2165

see #6775

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by WouterJ at 2013-01-21T18:44:20Z

+1
[HttpKernel] fixed failing test
[FrameworkBundle] fixed requirement of the _controller palceholder for the proxy route (closes #6783)

A controller name can be a service and service names can contain dots.