i-tsu: minor correction in RFC 5646 language tag entry

[Kaihsu Tai]

Dear Colleagues,

Two corrections need to be made to the entry i-tsu here:
http://www.iana.org/assignments/lang-tags/i-tsu

1 “Pu Zhongcheng (Basuya Boyizhenu)” should read “Pu Zhongcheng
(Pasuya Poiconü = Basuya Boyizhenu)”. This adds the reference author’s
spelling of his own name.

2 The native name “Cou” (alternative spelling) should be added, to
read: “Native name of language (transcribed into ASCII): Tsou, Cou”.

You might like to update the original requester’s email address as
well (as in the header of this message), but that is not essential.

Regards,
Kaihsu