Propagate errors from generate_hash_secret_salt up to XML_Parse/XML_ParseBuffer?

[hartwork]

At the moment, generate_hash_secret_salt uses fallback code when high quality sources of entropy fail to serve entropy. For the future we could propagate errors upwards so that XML_Parse/XML_ParseBuffer fails with an error, instead. We may need a new error code and consider pros and cons of that approach.

The call tree is:

1. XML_Parse/XML_ParseBuffer
2. startParsing
3. generate_hash_secret_salt

[kkkunche]

hartwork : Is this issue closed, from the code it looks like it is not ?.

[hartwork]

It's not closed but the hard part is consedarations regarding backwards compatibility. The hard part is figuring out the requirements, first.