Me, again, I changed utf8-string to system-filepath, and as simplest solution, I use it to convert ByteString to System.IO.FilePath in getSafePath, because you still need path as string for System.Directory.
Is this enough or I should get rid of System.FilePath functions where it is posible?
use system-filesystem to convert bytestring -> string in fileserve
merge original snap master
remove check for non control character in params parser