copy all conf file before upgrade

scripts/upgrade

@@ -71,8 +71,8 @@ path_url=$(ynh_normalize_url_path $path_url)
 #=================================================
 # STANDARD UPGRADE STEPS
 #=================================================
-filefrontendconf=$(mktemp /tmp/frontend-zabbix.conf.php.XXXXXX)
-cat /usr/share/zabbix/conf/zabbix.conf.php >$filefrontendconf
+cp -rp /etc/zabbix /tmp/
+cp -p /usr/share/zabbix/conf/zabbix.conf.php /tmp/
 
 DEBIAN_FRONTEND=noninteractive apt-mark unhold zabbix-server-mysql zabbix-frontend-php
 ynh_package_update
@@ -87,7 +87,9 @@ rm -fr zabbix-*.deb
 apt-get -y --only-upgrade install zabbix-server-mysql zabbix-agent
 DEBIAN_FRONTEND=noninteractive apt-mark hold zabbix-server-mysql zabbix-frontend-php
 
-cat "$filefrontendconf" >"/usr/share/zabbix/conf/zabbix.conf.php"
-rm "$filefrontendconf"
+cp -rpf /tmp/zabbix/* /etc/zabbix/ 
+cp -pf /tmp/zabbix.conf.php /usr/share/zabbix/conf/
+
+rm -fr /tmp/zabbix*
 
 systemctl reload nginx