cli_put: set content-type for uploads
cli_put: set content-type for uploads

Use the new file-extension->mime-type helper to determine the
content-type to specify for put.

Signed-off-by: David Disseldorp <589a549dc9f982d9f46aeeb82a09ab6d87ccf1d8@samba.org>

ddiss/elasto,ddiss/elasto