Fix fail2ban install without Nginx

wo/cli/plugins/stack_pref.py

@@ -1042,7 +1042,8 @@ def post_pref(self, apt_packages, packages, upgrade=False):
                 WOGit.add(self, ["/etc/fail2ban"],
                           msg="Adding Fail2ban into Git")
                 Log.info(self, "Configuring Fail2Ban")
-                data = dict(release=WOVar.wo_version)
+                nginxf2b = bool(os.path.exists('/var/log/nginx'))
+                data = dict(release=WOVar.wo_version, nginx=nginxf2b)
                 WOTemplate.deploy(
                     self,
                     '/etc/fail2ban/jail.d/custom.conf',

wo/cli/templates/fail2ban.mustache

@@ -4,7 +4,7 @@ ignoreip = 127.0.0.1/8 ::1
 [recidive]
 enabled = true
 
-[nginx-http-auth]
+{{#nginx}}[nginx-http-auth]
 enabled   = true
 logpath = /var/log/nginx/*error*.log
 
@@ -23,4 +23,4 @@ maxretry = 5
 enabled = true
 filter = nginx-forbidden
 action = iptables-multiport[name="nginx-forbidden", port="http,https"]
-logpath = /var/log/nginx/*error*.log
+logpath = /var/log/nginx/*error*.log{{/nginx}}