Refacted by moving variable declarations into distinct per-app files under 'options' subdirectory

roles/bootstrap/defaults/options/proftpd.yml

@@ -0,0 +1,16 @@
+---
+welcome_msg_path: /etc/proftpd/welcome.msg
+goodbye_msg_path: /etc/proftpd/bye.msg
+transfer_msg_path: /etc/proftpd/transfer.msg
+default_umask: 0022 0022
+users_allowed: root
+servername: ~
+admin_email: ~
+serveralias: localhost
+ftp_protocols: ftps
+ftp_port: 990
+sec_cert_path: /etc/srv/domain.cert.pem
+sca_cert_path: /etc/srv/domain.cert.pem
+key_cert_path: /etc/srv/private.key.pem
+ftp_auth_user_path: /etc/proftpd/ftp.passwd
+ftp_auth_group_path: /etc/proftpd/ftpd.group