Impossible to call dumpil /i on Linux

[kevingosse]

dumpil can't be called on Linux with the i parameter (to feed a direct address to IL code)

> dumpil -i 0x00007fce8c983790
Unknown option: -i
> dumpil /i 0x00007fce8c983790
Incorrect argument: 0x00007fce8c983790

The problem is that one one side dumpil declares the /i parameter:

    CMDOption option[] =
    {   // name, vptr, type, hasValue
        {"/d", &dml, COBOOL, FALSE},
        {"/i", &fILPointerDirectlySpecified, COBOOL, FALSE},
    };

But then on Linux, parameters are not allowed to start with a /:

#ifndef FEATURE_PAL
        if (ptr[0] != '-' && ptr[0] != '/') {
#else
        if (ptr[0] != '-') {
#endif

The fix could be to declare the parameter as -i on Linux, but this would cause inconsistencies with the documentation. I don't know why / is filtered out to begin with.

[mikem8361]

The reason '/' is not allowed on xplat is that it caused problems parsing file paths as args. It most cases '-' is used except for this case and for the dml '/d' which isn't supported on lldb.

I'll fix it by adding -i as an option and add it to the doc.