DrFTPD 4.0.9 release

This is a maintenance release to include the improvements on the code since the last release.

Fixes / Improvments :

Improve Transfers handling
Improve logging
Remove all windows slave specific code (Transfer issues that did not complete)
Some code cleanups and improvements
Added M2TS for MediaInfo
Master/Slave.sh and .bat (HEAP: Adding Xms which is equal to Xmx)
Hide logs and fix autofreespace shutdown [#251]
Many libs updated