[Bug 37217] wine builtin iexplore couldn't load local pages correctly in chinese named folders

https://bugs.winehq.org/show_bug.cgi?id=37217

--- Comment #4 from Hao Peng  ---
we found a bug in urlmon/url.c:
static inline void pct_encode_val(WCHAR val, WCHAR *dest)

this function convert a unsafe character into a safe string starting with %,
but it won't consider the condition of cjk characters in unicode, which will
encode into three %xx part.like:
中
%E4%B8%AD