Added self-signed key and certificate

Makefile

@@ -6,7 +6,9 @@ all: imapd-config cyrus-imapd-service
 	install -v -d -m755 /var/lib/imap
 	install -v -d -m755 /var/lib/imap/sieve
 	install -v -d -m755 /var/spool/imap
+	install -v -d -m755 /etc/ssl/cyrus-imapd
 	@echo "$$IMAPD_CONFIG" > /etc/imapd.conf
+	openssl req -x509 -nodes -days 3650 -newkey rsa:2048 -keyout /etc/ssl/cyrus-imapd/cyrus-imapd.key -out /etc/ssl/cyrus-imapd/cyrus-imapd.crt -subj "/C=GB/ST=London/L=London/O=Global Security/OU=IT Department/CN=example.com"
 	@echo "$$CYRUS_IMAPD_SERVICE" > /lib/systemd/system/cyrus-imapd.service
 	systemctl enable cyrus-imapd.service
 	rm -rf cyrus-imapd-3.2.3
@@ -23,8 +25,8 @@ sasl_pwcheck_method: saslauthd
 sasl_mech_list: PLAIN LOGIN
 allowanonymouslogin: no
 allowplaintext: yes
-tls_server_cert: /etc/ssl/cyrus-imapd/cyrus-imapd.pem
-tls_server_key: /etc/ssl/cyrus-imapd/cyrus-imapd.pem
+tls_server_cert: /etc/ssl/cyrus-imapd/cyrus-imapd.crt
+tls_server_key: /etc/ssl/cyrus-imapd/cyrus-imapd.key
 tls_server_ca: /etc/ssl/ca-bundle.pem
 altnamespace: 1
 munge8bit: 0