RegisterWithDotnetSuggest does not honor symlinks

On Linux, I have a Linux .NET executable with the full assembly name, installed at a custom installation location. For example:
```
/opt/company/product/Full.Assembly.Name.Executable
```
To make the program easily accessible, a symlink is installed, for example:
```
/usr/bin/executable -> /opt/company/product/Full.Assembly.Name.Executable
```

When invoked as `/usr/bin/executable` or simply `executable`, then `RegisterWithDotnetSuggest` actually registers `Full.Assembly.Name.Executable`.

Hint: The original (actually invoked) command is available as `/proc/self/cmdline` (up to the first NUL character). This is e.g. also what is displayed by `ps`.