fix(wsl2): fix boot, logind loop, hostname, and wsl.conf path

Critical WSL2 fixes:

1. Move wsl.conf to /etc/wsl.conf — WSL2 reads /etc/wsl.conf only;
   /usr/lib/wsl.conf was silently ignored, meaning [user] default=mios
   and [boot] systemd=true were never applied (hostname = container ID,
   login defaulted to root). Update .gitignore to whitelist etc/wsl.conf.
   Leave usr/lib/wsl.conf as a reference-only stub.

2. systemd-logind WSL2 drop-in — logind crashes in WSL2 (no VT devices)
   and retried indefinitely. Add ConditionVirtualization=!wsl drop-in to
   prevent the restart loop visible in the boot log.

3. boot.mount + boot-complete.target drop-ins — CoreOS's dynamic /boot
   mount requires /dev/disk/by-label/boot which doesn't exist in WSL2.
   Mask both units in WSL2; their dependents already had drop-ins.

4. Fix hostname in wsl-firstboot — hostnamectl requires logind (now masked
   in WSL2). Write /etc/hostname and call hostname(1) directly instead, so
   the configured MIOS_HOSTNAME is applied unconditionally.

5. Drop-ins for qemu-guest-agent, cloud-init-local/network/config — mask
   these services in WSL2 to eliminate boot noise and failed-unit clutter.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: Kabuki94

.gitignore

@@ -81,6 +81,7 @@ etc/containers/systemd/*
 !/etc/fapolicyd/
 etc/fapolicyd/*
 !/etc/fapolicyd/fapolicyd.rules
+!/etc/wsl.conf
 
 # /etc/mios/ is BOOTSTRAP territory (mios-bootstrap.git). Not tracked here.
 # /home/ is BOOTSTRAP territory. Per-user templates and skel live in mios-bootstrap.

etc/wsl.conf

@@ -0,0 +1,19 @@
+# MiOS WSL2 configuration — read by WSL2 from /etc/wsl.conf on every boot.
+# /usr/lib/wsl.conf is a reference copy only; WSL2 ignores it.
+[boot]
+systemd=true
+
+[user]
+default=mios
+
+[interop]
+enabled=true
+appendWindowsPath=false
+
+[automount]
+enabled=true
+options="metadata,umask=22,fmask=11"
+
+[network]
+generateHosts=true
+generateResolvConf=true

usr/lib/systemd/system/boot-complete.target.d/10-mios-wsl2.conf

@@ -0,0 +1,2 @@
+[Unit]
+ConditionVirtualization=!wsl

usr/lib/systemd/system/boot.mount.d/10-mios-wsl2.conf

@@ -0,0 +1,2 @@
+[Unit]
+ConditionVirtualization=!wsl

usr/lib/systemd/system/cloud-config.service.d/10-mios-wsl2.conf

@@ -0,0 +1,2 @@
+[Unit]
+ConditionVirtualization=!wsl

usr/lib/systemd/system/cloud-init-local.service.d/10-mios-wsl2.conf

@@ -0,0 +1,2 @@
+[Unit]
+ConditionVirtualization=!wsl

usr/lib/systemd/system/cloud-init-network.service.d/10-mios-wsl2.conf

@@ -0,0 +1,2 @@
+[Unit]
+ConditionVirtualization=!wsl

usr/lib/systemd/system/qemu-guest-agent.service.d/10-mios-wsl2.conf

@@ -0,0 +1,2 @@
+[Unit]
+ConditionVirtualization=!wsl

usr/lib/systemd/system/systemd-logind.service.d/10-mios-wsl2.conf

@@ -0,0 +1,2 @@
+[Unit]
+ConditionVirtualization=!wsl

usr/lib/wsl.conf

@@ -1,19 +1,4 @@
-# MiOS WSL2 configuration. Ignored on non-WSL boots.
-[boot]
-systemd=true
-command="/usr/libexec/mios/wsl-firstboot"
-
-[user]
-default=mios
-
-[interop]
-enabled=true
-appendWindowsPath=false
-
-[automount]
-enabled=true
-options="metadata,umask=22,fmask=11"
-
-[network]
-generateHosts=true
-generateResolvConf=true
+# MiOS WSL2 — REFERENCE COPY ONLY.
+# WSL2 reads /etc/wsl.conf, NOT this file. The functional config is at
+# /etc/wsl.conf (tracked in mios.git as etc/wsl.conf).
+# This file is kept for documentation purposes only.