tsssp: add policy registry key names

[cnotin]

This PR comes from the following observation.

I enabled the "delegation for default credentials with NTLM-only servers" using the Group Policy Editor. I obtained this in registry:

The key name is thus AllowDefCredentialsWhenNTLMOnly, as confirmed by the ADMX file.

Before the PR, kekeo fails to retrieve it due to using an incorrect name:

After the PR (actually I binary edited the executable):

This is what I initially intended to suggest. However, it still seems that AllowDefaultCredentialsWhenNTLMOnly is a valid name.
According to a few Google searches:

• AllowDefaultCredentialsWhenNTLMOnly is used to the default CredSSP policy (source)
• AllowDefCredentialsWhenNTLMOnly is used for the defined policy (source)

Since the same kuhl_m_tsssp_list_data function is used for both, I finally suggest to include both spelling to ensure to collect everything...

I also suggest to apply the same logic to AllowDefaultCredentialsWhenNTLMOnlyDomain/AllowDefCredentialsWhenNTLMOnlyDomain even if I do not find any trace of the latter on Google.