ddclient: T6981: Upgrade ddclient to v4.0.0

[indrajitr]

Change summary

Upgrade ddclient to version 4.0.0.

Details provided in the linked PR.

Note: We moved from GitHub to Debian Salsa in the past to pull in ddclient source. However, Debian Salsa doesn't catch up with GitHub releases that often. We are still using Debian Salsa as our source (because it has all the necessary Debian packaging toolchain setup), but are using a non-tagged (but stable) commit id to pull in the sources in combination with the necessary patches for the build.

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Code style update (formatting, renaming)
• Refactoring (no functional changes)
• Migration from an old Vyatta component to vyos-1x, please link to related PR inside obsoleted component
• Other (please describe):

Related Task(s)

• https://vyos.dev/T6981

Related PR(s)

vyos/vyos-1x/pull/5123

How to test / Smoketest result

vyos@current-2604:~$ /usr/libexec/vyos/tests/smoke/cli/test_service_dns_dynamic.py 
test_01_dyndns_service_standard (__main__.TestServiceDDNS.test_01_dyndns_service_standard) ... ok
test_02_dyndns_service_ipv6 (__main__.TestServiceDDNS.test_02_dyndns_service_ipv6) ... ok
test_03_dyndns_service_dual_stack (__main__.TestServiceDDNS.test_03_dyndns_service_dual_stack) ... ok
test_04_dyndns_rfc2136 (__main__.TestServiceDDNS.test_04_dyndns_rfc2136) ... ok
test_05_dyndns_hostname (__main__.TestServiceDDNS.test_05_dyndns_hostname) ... ok
test_06_dyndns_web_options (__main__.TestServiceDDNS.test_06_dyndns_web_options) ... ok
test_07_dyndns_dynamic_interface (__main__.TestServiceDDNS.test_07_dyndns_dynamic_interface) ... ok
test_08_dyndns_vrf (__main__.TestServiceDDNS.test_08_dyndns_vrf) ... ok

----------------------------------------------------------------------
Ran 8 tests in 524.777s

OK

Checklist:

• I have read the CONTRIBUTING document
• I have linked this PR to one or more Phabricator Task(s)
• My commit headlines contain a valid Task id
• My change requires a change to the documentation
• I have updated the documentation accordingly

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[github-actions]

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[indrajitr]

I have read the CLA Document and I hereby sign the CLA