Fix for bug 117055: Emails were being truncated if they contained a line with nothing...

Fix for bug 117055: Emails were being truncated if they contained a line with nothing but a period on them.  We now pass -i to
sendmail and its clones to tell it to ignore periods (since we close the pipe when we're done, rather than signalling it with
a period).  Has been tested with sendmail and postfix.
Patch by Dave Miller <justdave@syndicomm.com>
r= afranke, bugzilla@bkor.dhs.org, jake