Use original filename for Content-Disposition

In most cases this change will have no effect, but noes the response will use the filename that was originally requested. The downloaded filename can be modified to something different as well. E.g. the siteexport plugin will make use of it.
Use original filename for Content-Disposition

In most cases this change will have no effect, but noes the response will use the filename that was originally requested. The downloaded filename can be modified to something different as well. E.g. the siteexport plugin will make use of it.
nop
Re-order parameters to not break other callers
Re-order parameters to not break other callers

Needs a check for null now.
Merge pull request #517 from gamma/master

Add the original filename to sendFile for Content-Disposition