minidlna: Reverted code to 374.37 for now.

A few users were reporting issues, but it's working fine most others, making it hard to debug anything.
At a first glance, the latest version has both changes from the update to minidlna 1.1.1, some custom
code that Asus pulled, and some past fixes that have been lost (at least one freeimage() call is now
missing, bringing back past memory leaks).

Will try to sort this out at least partly when I have more time to look at this, so reverting for now.