urlinfo: Detect charset when Content-Type charset is invalid
urlinfo: Don't send invalid Content-Length
urlinfo: Send filename in general URL info
urlinfo: Send URL info even if Content-Type is missing
urlinfo: Fix NPE on header value trim
urlinfo: Fix appendHeader()
urlinfo: Fix Content-Disposition parsing
logs: Limit to 100 results by default
urlinfo: Don't send empty string

... if we don't find any interesting headers.