add SSL connection Test

+Listen 443 https

+SSLEngine on

+- /etc/httpd/conf.d/VirtualHosts.conf (抜粋)

+バーチャルホスト毎に SSL 設定が必要。

+```

+<VirtualHost *:80 *:443>

+ ServerName vh1.<ドメイン1>

+ DocumentRoot /var/www/vh1-html/

+ SSLEngine on

+ SSLCertificateFile /etc/letsencrypt/live/<ドメイン1>/cert.pem

+ SSLCertificateKeyFile /etc/letsencrypt/live/<ドメイン1>/privkey.pem

+ SSLCertificateChainFile /etc/letsencrypt/live/<ドメイン1>/chain.pem

+ <Directory "/var/www/vh1-html">

+ AllowOverride All

+ </Directory>

+</VirtualHost>

+```

+

+# systemctl restart httpd

+- 動作確認

+ ```

+ $ openssl s_client -connect <ホスト>:443

+ ```

+ - 設定失敗

+ ```

+ CONNECTED(00000003)

+ 140139752064912:error:140770FC:SSL routines:SSL23_GET_SERVER_HELLO:unknown protocol:s23_clnt.c:794:

+ ---

+ no peer certificate available

+ ---

+ No client certificate CA names sent

+ ---

+ SSL handshake has read 7 bytes and written 289 bytes

+ ---

+ New, (NONE), Cipher is (NONE)

+ Secure Renegotiation IS NOT supported

+ Compression: NONE

+ Expansion: NONE

+ No ALPN negotiated

+ SSL-Session:

+ Protocol : TLSv1.2

+ Cipher : 0000

+ Session-ID:

+ Session-ID-ctx:

+ Master-Key:

+ Key-Arg : None

+ Krb5 Principal: None

+ PSK identity: None

+ PSK identity hint: None

+ Start Time: 1535884386

+ Timeout : 300 (sec)

+ Verify return code: 0 (ok)

+ ---

+ ```

+ - 設定成功

+ ```

+ CONNECTED(00000003)

+ depth=2 O = Digital Signature Trust Co., CN = DST Root CA X3

+ verify return:1

+ depth=1 C = US, O = Let's Encrypt, CN = Let's Encrypt Authority X3

+ verify return:1

+ depth=0 CN = *.<ドメイン1>

+ verify return:1

+ ---

+ Certificate chain

+ 0 s:/CN=*.<ドメイン1>

+ i:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3

+ 1 s:/C=US/O=Let's Encrypt/CN=Let's Encrypt Authority X3

+ i:/O=Digital Signature Trust Co./CN=DST Root CA X3

+ ---

+ Server certificate

+ -----BEGIN CERTIFICATE-----

+ MIIGETCCBPmgAwIBAgISA3VBvI0cSyzAQGtpIaQKQRZxMA0GCSqGSIb3DQEBCwUA

+ ...

+ ```

+