Fix parsing of FTP `SIZE' responses in proxy module: The newline was not

truncated which forced following HTTP headers to be data in the HTTP reponse.
Although the reponse now is copied out from the response buffer because it is
only temporary and overridden at other points.

Original  patch submitted by: Charles Fu <ccwf@bacchus.com>
Corrected patch submitted by: Ralf S. Engelschall
PR: 2412


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/branches/1.3.x@81544 13f79535-47bb-0310-9956-ffa450edef68