Merge branch 'js/mingw-use-utf8'

Windows update. * js/mingw-use-utf8: mingw: fix possible buffer overrun when calling `GetUserNameW()` mingw: use Unicode functions explicitly mingw: get pw_name in UTF-8 format

Junio C Hamano committed Jul 11, 2019 at 15:16 UTC 0a2ff7c6b5ec5e4301a9cfb3c0dd26590d70ad7a

No changes.