symfony/symfony — pull request #8708 by fabpot (2013-08-09 14:15:12+00:00)
Title: Add the referer information that could help you findout where's the link comes from

| Q | A
| ------------- | ---
| Bug fix? | no
| New feature? | yes
| BC breaks? | no
| Deprecations? | no
| Tests pass? | yes
| Fixed tickets | n/a
| License | MIT
| Doc PR | n/a

#8218 rebased on master and slightly tweaked.