[PATCH v2 0/1] MR5047: server, ntdll: Use 64 bit for unix thread id.

[Marc-Aurel Zent (＠mzent)]

This is in preparation for the mach thread id rework, which requires 64 bit there (and incidentally also stops truncating the FreeBSD one).

There wasn't any direct usage of `__int64` in the sever protocol before, so I added a new typedef and a new `dump_int64()` function (not sure if needed per se though).

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  v2: server, ntdll: Use 64 bit for unix thread id.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/5047