<install> Write EOL to /etc/ssh/sshd_config

In the configure_sshd_on_node function in openshift.ks/openshift.sh, be
sure to write the \n EOL marker when adding the AcceptEnv setting.

After commit 24d469fd2f2aa0bcc0d430f7ee148598fdb29e23,
configure_sshd_on_node writes a \n to sshd_config _before_ the line that
the function adds, for the contingency that sshd_config already has an
incomplete line lacking the EOL marker.  However, after that commit, the
function wasn't writing the \n _of_ the line that the function adds.  This
commit makes the function write both \n EOL markers.

This commit fixes bug 1068649.
Merge pull request #302 from Miciah/bug-1068649-write-EOL-to-etc-ssh-sshd_config

<install> Write EOL to /etc/ssh/sshd_config