ql-lg-server: Quake Live LG vampiric practice server in Docker

One-command setup (SteamCMD + minqlx build), .env settings with a
listed/unlisted switch, three factories (lgvamp, lgvamp_nolag, lgvamp100),
warmup-text and welcome minqlx plugins, watchdog/backup/daily-restart,
docs for admins and players.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

tools/qlrcon.py

@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+"""Quake Live RCON over ZMQ. Runs inside the container (through ./rcon), so the password never
+leaves the server machine.
+  ./rcon status        one command
+  ./rcon               interactive prompt (Ctrl+D or 'exit' to quit)
+Protocol (id's zmq_rcon.py): DEALER socket, ZMQ PLAIN auth user 'rcon', zap_domain 'rcon',
+first message 'register', then each message is a console command; console output comes back.
+"""
+import os, re, sys, uuid
+import zmq
+
+PW = open("/ql/secrets/rcon-password.txt").read().strip()
+HOST = "tcp://127.0.0.1:" + os.environ.get("QL_RCON_PORT", "28960")
+COLOR = re.compile(r"\^\d")
+
+def connect():
+    s = zmq.Context.instance().socket(zmq.DEALER)
+    s.plain_username = b"rcon"
+    s.plain_password = PW.encode()
+    s.zap_domain = b"rcon"
+    s.setsockopt(zmq.IDENTITY, uuid.uuid4().hex.encode())
+    s.setsockopt(zmq.LINGER, 0)
+    s.connect(HOST)
+    s.send(b"register")
+    return s
+
+def drain(s, first_wait, quiet=0.6):
+    out, wait = [], first_wait
+    while s.poll(int(wait * 1000)):
+        out.append(s.recv().decode(errors="replace"))
+        wait = quiet
+    return "".join(out)
+
+def clean(text):
+    # never show the password, whatever the server echoes
+    lines = [COLOR.sub("", l) for l in text.splitlines()
+             if "zmq_rcon_password" not in l and PW not in l]
+    return "\n".join(lines).strip()
+
+def run(s, cmd):
+    drain(s, first_wait=0.3, quiet=0.2)          # drop console chatter that arrived in between
+    s.send(cmd.encode())
+    out = clean(drain(s, first_wait=3.0))
+    return out or "(no output: ok, or server down / map loading / wrong password)"
+
+def main(argv):
+    s = connect()
+    if len(argv) > 1:
+        print(run(s, " ".join(argv[1:]))); return 0
+    print("Quake Live rcon - server commands (status, addbot hunter 5, kick allbots, map thunderstruck lgvamp, say hi). Ctrl+D to quit.")
+    while True:
+        try:
+            line = input("ql> ").strip()
+        except (EOFError, KeyboardInterrupt):
+            print(); return 0
+        if line in ("exit", "quit"):
+            return 0
+        if line:
+            print(run(s, line))
+
+if __name__ == "__main__":
+    sys.exit(main(sys.argv))