Allowing custom mime types and adding more default mime types. Fixes #4517.
Allowing custom mime types and adding more default mime types. Fixes #4517.

git-svn-id: 5860920b332e8b1c20d5ac1ddb0cfb1512ef151a@7778 3807eeeb-6ff5-0310-8944-8be069107fe0

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