clean up ecore-con server example: HTTP requires a seperator (\r\n in this case)...

clean up ecore-con server example: HTTP requires a seperator (\r\n in this case) following each header line and a double separator between headers and body. additionally, content-length must be EXACTLY the length of the body, and must not include trailing garbage.
snprintf use here is incorrect due to inconsistent behavior of snprintf, so we can lazily fall back to strlen since this is just a simple example

git-svn-id: svn+ssh://svn.enlightenment.org/var/svn/e/trunk/ecore@61421 7cbeb6ba-43b4-40fd-8cce-4c39aea84d33