Updating configuration (#197)

#### Added

- [ACME] Display warning about sudo usage when issuing certificate with DNS API validation (require `sudo -E`)

#### Changed

- [ACME] Resolve domain IP over HTTPS with Cloudflare DNS Resolver
- [CORE] Cement Framework updated to v2.10.2
- [SITE] database name = 0 to 16 characters from the site name + 4 randomly generated character
- [SITE] database user = 0 to 12 characters from the site name + 4 randomy generated character
- [STACK] Improve sysctl tweak deployment

#### Fixed

- [SITE] https redirection missing on subdomains sites
- Issues with digitalocean mariadb repository
- Cement Framework output handler issues
- [CLEAN] check if Nginx is installed before purging fastcgi or opcache

wo/cli/ext/wo_outputhandler.py

@@ -1,21 +0,0 @@
-# Based on https://github.com/datafolklabs/cement/issues/295
-# To avoid encoding releated error,we defined our custom output handler
-# I hope we will remove this when we upgarde to Cement 2.6 (Not released yet)
-import os
-
-from cement.ext.ext_mustache import MustacheOutputHandler
-from cement.utils import fs
-
-
-class WOOutputHandler(MustacheOutputHandler):
-    class Meta:
-        label = 'wo_output_handler'
-
-    def _load_template_from_file(self, path):
-        for templ_dir in self.app._meta.template_dirs:
-            full_path = fs.abspath(os.path.join(templ_dir, path))
-            if os.path.exists(full_path):
-                self.app.log.debug('loading template file %s' % full_path)
-                return open(full_path, encoding='utf-8', mode='r').read()
-            else:
-                continue