ACTION-275 Proposed text to address issue 360

As per my action item, below please find proposed text to incorporate a
requirement about recording alternative content.  Note that this is a
copy/paste straight from my fork of the source

4.5.9 *[DAC-9]* Provide the user with the option to record alternative
content along with the primary content on devices where recording is
available.
NOTE

This feature can be user configurable to allow maximum flexibility in
trading off the anticipated future need for the description against the
amount of extra data storage required. A flexible solution giving maximum
control to the user would be to provide a global setting with the following
options:


   - Always record the alternative content (the best default option, since
   a resource recorded by one user may later be accessed by another different
   user who may have different and unanticipated requirements);
   - Record the alternative content only if it is active at the time of
   recording;
   - Ask at recording time whether to record the alternative content;
   - Never record the alternative content.