Adding final ESXI deployment code

ESXi/Packer/_common/sshd.sh

@@ -0,0 +1,20 @@
+#!/bin/sh -eux
+
+SSHD_CONFIG="/etc/ssh/sshd_config"
+
+# ensure that there is a trailing newline before attempting to concatenate
+sed -i -e '$a\' "$SSHD_CONFIG"
+
+USEDNS="UseDNS no"
+if grep -q -E "^[[:space:]]*UseDNS" "$SSHD_CONFIG"; then
+    sed -i "s/^\s*UseDNS.*/${USEDNS}/" "$SSHD_CONFIG"
+else
+    echo "$USEDNS" >>"$SSHD_CONFIG"
+fi
+
+GSSAPI="GSSAPIAuthentication no"
+if grep -q -E "^[[:space:]]*GSSAPIAuthentication" "$SSHD_CONFIG"; then
+    sed -i "s/^\s*GSSAPIAuthentication.*/${GSSAPI}/" "$SSHD_CONFIG"
+else
+    echo "$GSSAPI" >>"$SSHD_CONFIG"
+fi