Summary

Fixes #970. Git Bash was rewriting OpenSSL's /CN=... subject argument as a Windows path. Disable MSYS path conversion for this script so certificates generate on Windows, which lets make test run the full test suite on Windows instead of only ./stats.

Running all tests on Windows surfaced the following, also fixed here:

Real bugs (all platforms)

• rapi/data.go: TSV index leaked a file descriptor per successfully read .json file.
• periodic: fileAccessLogger never closed its file; added Close().
• periodic: runner could ignore Abort() when behind schedule — with sleepDuration <= 0 both the expired timer and the closed stop channel are ready and select picks randomly (~50% per iteration), causing occasional TestInfiniteDurationAndAbort failures (17 calls instead of ≤15, 730ms after abort).

Windows support / portability

• fnet.Listen: detect Unix domain socket paths using the OS path separator too (C:\... paths were treated as TCP ports).
• Tests: close access log / file handles before t.TempDir() cleanup, use t.TempDir() instead of /tmp, use https instead of domain service name (not in Go's builtin table with netgo/no /etc/services), skip the chmod-0 unreadable file check on Windows.
• cli_test.txtar: accept the Windows "file not found" message; use taskkill instead of pkill on Windows.

Validation

• Reproduced the original Git Bash/OpenSSL failure on the base revision; the updated script generated the CA, server, and client certificates under Git Bash.
• Full test suite passes on Linux/macOS locally (-race -tags netgo) and on Windows CI.

(co - authored by owner ldemailly)