BUG/MINOR: logs: leave startup-logs global and not per-thread

Commit f8188c6 ("MEDIUM: threads/logs: Make logs thread-safe") made logs
thread-local but it also made the copy of the startup-logs thread-local,
meaning that when threads are configured, upon startup the list of startup
logs appears to be empty. Let's just remove the THEAD_LOCAL directive
there, as the check for the startup period is already present.

This fix should be backported to 1.8.
1 file changed