feat: use comments in config files to file certificates

config files in /etc/nginx/conf.d can contain:

```

```

certificates files are in /etc/nginx/conf.d/certificates

these contain un commented lines

src/nginx_conf.d/certbot.conf

@@ -1,7 +1,7 @@
 server {
     # Listen on plain old HTTP
     listen 80 default_server reuseport;
-    listen [::]:80 default_server reuseport;
+    #listen [::]:80 default_server reuseport;
 
     # Pass this particular URL off to certbot, to authenticate HTTPS certificates
     location '/.well-known/acme-challenge' {

src/scripts/util.sh

@@ -15,14 +15,14 @@ error() {
 # /etc/letsencrypt/live/<primary_domain_name>/privkey.pem
 parse_domains() {
     # For each configuration file in /etc/nginx/conf.d/*.conf*
-    for conf_file in /etc/nginx/conf.d/*.conf*; do
+    for conf_file in /etc/nginx/conf.d/certificates/*.conf*; do
         sed -n -r -e 's&^\s*ssl_certificate_key\s*\/etc/letsencrypt/live/(.*)/privkey.pem;\s*(#.*)?$&\1&p' $conf_file | xargs echo
     done
 }
 
 # Given a config file path, spit out all the ssl_certificate_key file paths
 parse_keyfiles() {
-    sed -n -e 's&^\s*ssl_certificate_key\s*\(.*\);&\1&p' "$1"
+    sed -n -e 's&^\s*# ssl_certificate_key\s*\(.*\);&\1&p' "$1"
 }
 
 # Given a config file path, return 0 if all keyfiles exist (or there are no