Imported Upstream version 3.8.0
Merge tag 'upstream/3.8.0'

Upstream version 3.8.0
Revert "Make monodoc-manual a recommendation, not a dependency, of mono-complete. It pulls in too many deps."

This reverts commit 713a04c3e9a3983b02ab23e9c510df0c2e9d3fd6.
Make monodoc-manual Recommend: not Depend: on a manual reader. This matches the upstream behaviour, whilst still allowing Apt to be aware of an important packaging relationship (and in most end-user cases, will install the manual reader anyway)
Add new symbols to .symbols files
Finalize changelog