DOC: Parameters name and fastpath of Series are not documented
#### Problem description

At https://pandas.pydata.org/pandas-docs/stable/reference/api/pandas.Series.html
the parameters *name* and *fastpath* are not explained.

*Edit*: See #20110 for *fastpath* - at least a short note "deprecated" or "to be deprecated" or "internal only" would help that users don't have to bother with this parameter.
