Add net.slot_range, a shrinkable container slot range (read as the IPv4
last octet a new container may take; idx = octet-1) that bounds how many
containers can be created and, consequently, how much of the user-port
block 10000-29999 a host reserves. Default 2-201 = 200 slots; must always
be a sub-range of 2-201 (only-shrink rule). Affects ONLY new containers —
existing ones keep their slot/ports.
- cfg: add net.slot_range with strict ParseSlotRange validation
(exactly one '-', both ends integers in 2..201, lo<=hi), SlotCount/
SlotIdxBounds helpers, and VPSMGR_SLOT_RANGE env handling in FillAuto.
Register net.slot_range as operator / next-add in the config registry.
- db/mgr: NextFreeIdx now picks from a caller-supplied [idxMin,idxMax]
window instead of the fixed 1..cfg.MaxUsers; mgr.Add feeds it from the
configured range. Existing users outside a narrowed range keep their
slots.
- admin panel: capacity readout follows SlotCount() instead of a fixed
200 (honestly shows over-capacity when pre-existing users fall outside
a shrunken range).
- installer: 00-checklist asks the slot range right after the subnet
octet (env/adoption/non-interactive branches, validated). The
port-occupancy check now scans only the range's user-port span rather
than the whole 10000-29999.
- 80/443 handling: if either is already bound by a non-vpsmgr process,
the install no longer fails — it proceeds with Traefik installed but
DISABLED (net.traefik false, no autostart). 00-check writes a marker
that install.sh turns into VPSMGR_TRAEFIK=0 for 30-traefik and the
panel. A belt-and-suspenders guard skips the force-off when our own
traefik.service is already active (update/adoption). SSH 30000-31999
and the user-port span remain hard failures.
- traefik: bump pinned version to 3.7.12 and rewrite 30-traefik's
enable/disable decision to respect the effective net.traefik (forced
env > adopted config > default), so a disabled traefik is never
briefly started.
- docs: README(s), config example, architecture and configuration docs
updated; tests added for slot-range parsing and the FillAuto env vars.
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