If you tried this
Use-Icinga; Get-IcingaSSLCertForSocket -CertFile "C:/my/cert.pfx"
the former code expanded like
$FileType = Get-Item -Path "C:/my/cert.pfx";
if ("cert.pfx" -eq '.pfx') { ... not reached ... }
and thus did not load the certificate file.
Now use GetExtension instead of Get-Item to make the .pfx check work.
