Add comments and upgrade some stuff

scripts/change_url

@@ -57,8 +57,6 @@ nginx_conf_path=/etc/nginx/conf.d/$old_domain.d/$app.conf
 # Change the path in the nginx config file
 if [ $change_path -eq 1 ]
 then
-	# Make a backup of the original nginx config file if modified
-	ynh_backup_if_checksum_is_different "$nginx_conf_path"
 	# Set global variables for nginx helper
 	domain="$old_domain"
 	path_url="$new_path"
@@ -66,11 +64,6 @@ then
 	ynh_app_setting_set $app path_url "$path_url"
 	# Create a dedicated nginx config
 	ynh_add_nginx_config
-	if [ "$path_url" != "/" ]
-	then
-		ynh_replace_string "^#sub_path_only " "" "$nginx_conf_path"
-	fi
-	ynh_store_file_checksum "$nginx_conf_path"
 fi
 
 # Change the domain for nginx