Comment 13 for bug 1649066

https://sourceforge.net/p/dcplusplus/code/ci/65212958fd4e1e008eeac859fea56f8d71e3625a/ addresses that aspect of the issue.

The specific issue pointed out wasn't really possible to trigger on DC++'s supported platforms insofar as Linux isn't a supported target, and Windows claims to provide filenames in natively Unicode form already, but worth addressing.