Update ddclient configuration for IPv4 usage

[niklassiemer]

I have some problems with my ddclient updates and consulted the --help. It states that the use= and web= pattern are deprecated in favor of usev${IPVERSION} and webv${IPVERSION}. Since the api.ipify.org/ provides me with a IPv4, I assumed the config is for the v4 version.

[enoch85]

Not tested, but lets do this!

[niklassiemer]

I now reran the setup of ddclient via the menu.sh script and got the following conf file automatically:

# Configuration file for ddclient generated by debconf
#
# /etc/ddclient.conf

# Default system settings
usev4=webv4, webv4=https://api.ipify.org

# Workaround for ddclient 3.10.0+ parsing bug disabled
# The 'curl=yes' option causes "curl not found" errors even with curl installed
# See: https://github.com/ddclient/ddclient/issues/499
# and: https://github.com/nextcloud/vm/issues/2754
# curl=yes

# DDNS-service specific setting
# Provider=deSEC
protocol=dyndns2
server=update.dedyn.io
ssl=yes

# user specific setting
login=$FQDN
password=***

# Hostname follows:
$FQDN

Thus, the change might not have been needed! Thanks for the merge, though :)

However, the setup gave me an error:

WARNING:  '' is not a valid IPv4 or IPv6 address
WARNING:  found neither IPv4 nor IPv6 address
WARNING: $FQDN: unable to determine IP address with strategy use=ip
FATAL:    Error loading the Perl module IO::Socket::SSL needed for SSL connect.
FATAL:    On Debian, the package libio-socket-ssl-perl must be installed.
FATAL:    On Red Hat, the package perl-IO-Socket-SSL must be installed.
FATAL:    On Alpine, the package perl-io-socket-ssl must be installed.

Installing the libio-socket-ssl-perl and ddclient --force finally got my ddclient working.
(I had a wrong DNS server set up at the main install)