zio fork 1.8.2b-zio3: ban reasons on join, @css/bypassipban, spectators keep hidden

Banned players are let in long enough to be told the ban's reason and time left, then kicked
after KickTime, instead of only seeing "Your client is not allowed to join this server"; they
can't chat, talk or join a team meanwhile. New permission @css/bypassipban (players or groups,
implied by @css/root) skips IP and shared-IP bans, leaving only bans on their own SteamID, on
join and in the periodic check. Moving to spectators no longer unhides a hidden admin; only
joining T or CT does.

README.md

@@ -8,6 +8,12 @@ from the `build-1.8.2b` tag). Changes, all marked `zio:` in the code:
   place of "Your chat is blocked to: <end date>". New lang keys `sa_player_penalty_gag_active`,
   `..._gag_active_perm`, `..._silence_active`, `..._silence_active_perm` and
   `sa_player_penalty_no_reason`, in `lang/en.json` only (other languages fall back to it).
+- Moving to spectators doesn't unhide a hidden admin; only joining T or CT does.
+- A banned player is let in long enough to be told the reason and time left, then kicked after
+  `KickTime`, instead of seeing only "Your client is not allowed to join this server".
+- New permission `@css/bypassipban`, for players or groups: IP bans, and bans on other accounts
+  that share their IP, don't apply to them; a ban on their own SteamID still does. `@css/root`
+  has it, as it has every `@css` flag.
 
 Publish with `FORGEJO_TOKEN=... ./release.sh v<ModuleVersion>` (ModuleVersion is `1.8.2b-zioN`).
 It rebuilds from the committed source and uploads `SimpleAdmin-<tag>.tar.gz` to git.zio.sh