Relicensing and rebasing LibreOffice

The MPL is in many ways functionally equivalent to the LGPL, it is a weak copyleft license. So it is very unlike the Apache license. The main differences is that the MPL applies per file or source code, and I don't think there is any provision to allow re-linking, while the LGPL forces distributors to allow replacing a LGPL bit of code with a modified version downstream.