Don't send files twice and remove extra \r\n from header

Don't send files twice and remove extra \r\n from header

After the manager http auth changes, we forgot to remove the manual
sending of the file. Also, ast_http_send adds two \r\n to the header that
is passed to it, so a trailing \r\n is removed from the Content-type
header. It might be better to change ast_http_send, but I don't like changing
the behavior of an API function.

(closes issue #17239)
Reported by: cjacobsen
Patches:
      patch2.diff uploaded by cjacobsen (license 1029)
Tested by: lathama, cjacobsen

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@270660 65c4cc65-6c06-0410-ace0-fbb531ad65f3