Enable Curl as default probe type

[tbussmann]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description:

Despite the curl binary is available, it's not possible to add target using probe = Curl in Targets because the probe is not declared in Probes.

Benefits of this PR and context:

This makes it easier to use probes of type Curl. In the readme there is no mention of the need to edit Probes file, only Targets.

How Has This Been Tested?

This has been tested with a demo target. The minimal default values are taken from documentation.

Discussion

• Shall there be a sample in the Targets file?
• Is the default config useful as is?
• Would it be better to use AnotherCurl instead of Curl?

Source / References:

• Documentation of the Curl Probe
• Documentation of the AnotherCurl Probe

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[LinuxServer-CI]

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https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-5be6fcde-dev-00b7124abfdc4d06d4ea932d335bdf70802294ef-pr-192/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-5be6fcde-dev-00b7124abfdc4d06d4ea932d335bdf70802294ef-pr-192	✅
arm64v8-2.8.2-r3-pkg-5be6fcde-dev-00b7124abfdc4d06d4ea932d335bdf70802294ef-pr-192	❌

[LinuxServer-CI]

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https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-ed6dce9e-dev-9291b82849099cb965adb12a023714b325124ba3-pr-192/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-ed6dce9e-dev-9291b82849099cb965adb12a023714b325124ba3-pr-192	✅
arm64v8-2.8.2-r3-pkg-ed6dce9e-dev-9291b82849099cb965adb12a023714b325124ba3-pr-192	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-8b437131-dev-6290af4bfd2d8f9cd75bf0f667d97b5c938be492-pr-192/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-8b437131-dev-6290af4bfd2d8f9cd75bf0f667d97b5c938be492-pr-192/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-8b437131-dev-6290af4bfd2d8f9cd75bf0f667d97b5c938be492-pr-192	✅
arm64v8-2.8.2-r3-pkg-8b437131-dev-6290af4bfd2d8f9cd75bf0f667d97b5c938be492-pr-192	❌

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-53d767fd-dev-53d92b16ba2ea4073f5036130fb34a2a5b8493fc-pr-192/index.html
https://ci-tests.linuxserver.io/lspipepr/smokeping/2.8.2-r3-pkg-53d767fd-dev-53d92b16ba2ea4073f5036130fb34a2a5b8493fc-pr-192/shellcheck-result.xml

Tag	Passed
amd64-2.8.2-r3-pkg-53d767fd-dev-53d92b16ba2ea4073f5036130fb34a2a5b8493fc-pr-192	✅
arm64v8-2.8.2-r3-pkg-53d767fd-dev-53d92b16ba2ea4073f5036130fb34a2a5b8493fc-pr-192	❌

[thespad]

Superseded by #196