change internal dictionary separator

Propose for 1906, we could adjust the internal dictionary separator from a dot (.) to a comma (,) separator. The change in output appearance would be minimal. Eg,

/path/dictionary/subdict1,subdict2,entry

But by using a comma, which is rarely if ever used within a keyword, we could have things like this

file.obj
{
    type xxx;
}

And now be able to recover the keyword file.obj from the dictionary dictName() method. At the moment the dictName() parses based on dot and would return obj instead.

@Development