change -n to -nn because -n is a valid argument for SSH that we sometimes need

Author: reidsunderland

bin/sr3_ssh

@@ -32,13 +32,14 @@ if [ -e "${ssh_user_config}" ] && { [ -z "${SSH_AUTH_SOCK}" ] || [ -z "${SSH_AGE
 fi
 
 # numerical host, issue #19
-if [[ "$1" == "-n"* ]] ; then
+if [[ "$1" == "-nn"* ]] ; then
     machine_list="${git_tld}/_dsh_config/${pump_name}.list"
     if [ ! -e "${machine_list}" ]; then
         echo "[ERROR] dsh machine list does not exist (${machine_list})."
         exit 4
     fi
-    hostname="$(head "${1}" "${machine_list}" | tail -n1)"
+    head_n="${1/nn/n}"
+    hostname="$(head "${head_n}" "${machine_list}" | tail -n1)"
     echo "Host ${1} --> ${hostname}"
     shift
 fi