allowed sfWebRequest::getRelativeUrlRoot() to be overidden by config (closes #873)
allowed sfWebRequest::getRelativeUrlRoot() to be overidden by config (closes #873)

git-svn-id: 2f0e1b834f829f9d45d4005679b0d62d953a4cdf@2039 4396de85-42e0-4213-a939-0f47b466bcdf

morhekil/symfony,morhekil/symfony,morhekil/symfony