Proof of concept for windows compilation (do not merge)

[NeitrinoK]

Environment:
Windows 10
Go 1.18 windows/amd64
MSYS64 (https://www.msys2.org/) with installation make and gcc package

pacman -S make
pacman -S gcc

Do not forget add path to go binary, check with

$ go version
go version go1.18.10 windows/amd64

Result:

$ bin/nocc-server
2023-05-24 01:52:42 INFO nocc-server started
2023-05-24 01:52:43 INFO env: listenAddr 0.0.0.0:43210 ; num cpu 12 ; version v1.2, rev 73b26e5, compiled at 2023-05-23 22:36:47 UTC
2023-05-24 01:53:35 INFO new client clientID eWPbFcXn version Unknown ; nClients 1
2023-05-24 01:53:35 INFO new remotes list 1 clientID eWPbFcXn 127.0.0.1
2023-05-24 01:53:36 ERROR can't create dir /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests/dt/cmake1/src mkdir /tmp/nocc/cpp/clients/eWPbFcXn/K:: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 ERROR can't create dir /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests mkdir /tmp/nocc/cpp/clients/eWPbFcXn/K:: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 INFO started sessionID 1 clientID eWPbFcXn waiting 6 uploads dt/cmake1/src/main.cpp
2023-05-24 01:53:36 ERROR fs uploading->error sessionID 1 /K:\nocc\tests/dt/cmake1/src/all-headers.h open /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests/dt/cmake1/src/all-headers.h.5577006791947779410: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 ERROR fs uploading->error sessionID 1 /K:\nocc\tests/dt/cmake1/src/my-math.h open /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests/dt/cmake1/src/my-math.h.8674665223082153551: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 ERROR fs uploading->error sessionID 1 /K:\nocc\tests/dt/cmake1/src/my-strings.h open /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests/dt/cmake1/src/my-strings.h.6129484611666145821: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 ERROR fs uploading->error sessionID 1 /K:\nocc\tests/dt/cmake1/src/my-warning.h open /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests/dt/cmake1/src/my-warning.h.4037200794235010051: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 ERROR fs uploading->error sessionID 1 /K:\nocc\tests/dt/cmake1/src/empty.h open /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests/dt/cmake1/src/empty.h.3916589616287113937: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 ERROR fs uploading->error sessionID 1 /K:\nocc\tests/dt/cmake1/src/main.cpp open /tmp/nocc/cpp/clients/eWPbFcXn/K:\nocc\tests/dt/cmake1/src/main.cpp.6334824724549167320: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:36 INFO client disconnected clientID eWPbFcXn ; nClients 0
2023-05-24 01:53:36 INFO new client clientID eCjCcWIC version v1.2, rev 73b26e5, compiled at 2023-05-23 22:30:47 UTC ; nClients 1
2023-05-24 01:53:37 INFO new client clientID VbnItEdo version Unknown ; nClients 2
2023-05-24 01:53:37 ERROR can't create dir /tmp/nocc/cpp/clients/VbnItEdo/K:\nocc\tests/dt mkdir /tmp/nocc/cpp/clients/VbnItEdo/K:: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:37 ERROR can't create dir /tmp/nocc/cpp/clients/VbnItEdo/K:\nocc\tests mkdir /tmp/nocc/cpp/clients/VbnItEdo/K:: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:37 INFO started sessionID 1 clientID VbnItEdo waiting 1 uploads dt/path-macro.cpp
2023-05-24 01:53:37 ERROR fs uploading->error sessionID 1 /K:\nocc\tests/dt/path-macro.cpp open /tmp/nocc/cpp/clients/VbnItEdo/K:\nocc\tests/dt/path-macro.cpp.605394647632969758: The filename, directory name, or volume label syntax is incorrect.
2023-05-24 01:53:37 INFO client disconnected clientID VbnItEdo ; nClients 1
2023-05-24 01:53:51 INFO client disconnected clientID eCjCcWIC ; nClients 0