Fixes #1429

This option got added by misstake. Disable it as it doesn't do any
good for this application.

Zeroed in on by:	scoof

SLT_Debug is special as it is both used as a binary log record and as
a text record. Add a special case for it and don't escape-output the
trailing zero.

Also make sure that objects marked uncacheable on an IMS is treated
as such.

Rename beresp.storage to beresp.storage_hint for consistency.

This would cause the API to link this log record to itself, creating
endless loops. Correct it by setting it to zero (meaning no parent).

Fixes issue where a 2nd VSM context is used to get the current name,
not taking any -n/-N arguments into account

This makes sure that VSM_Name always has something sensible to return.