bug 1112: Fix things popped up in review:

- whitespace/indentation
- require vs. include and possible issue with relative path
- wording
- intval($id)
- unnecessary change of language while the text is not sent through gettext
anyway
- do not use mysql_escape_string on email body
- make strings easier to translate

Signed-off-by: Michael Tänzer <neo@nhng.de>
bug 1112: Get TTP Assurances received, not given.

Signed-off-by: Michael Tänzer <neo@nhng.de>