FIXED: parse_time/2,3: allow for fractional part in seconds.
FIXED: parse_time/2,3: allow for fractional part in seconds.

TBD: ISO 8601 allows for fractional parts in every _last_ time
component.  Second is always last, but a fractional spec is also
allowed if minutes is the last.

jn7163/swipl-devel,jn7163/swipl-devel,jn7163/swipl-devel,mndrix/swipl-devel,jn7163/swipl-devel,mndrix/swipl-devel,mndrix/swipl-devel,edechter/swipl-devel,edechter/swipl-devel,koryonik/swipl-devel,koryonik/swipl-devel,mndrix/swipl-devel,edechter/swipl-devel,koryonik/swipl-devel,koryonik/swipl-devel,edechter/swipl-devel,jn7163/swipl-devel,edechter/swipl-devel,koryonik/swipl-devel,mndrix/swipl-devel