zinit: stabilize ntp/network/getty runtime

• ntp: robust /etc/ntp.conf symlink, safe defaults, avoid nounset, keep BusyBox CLI -p usage

• network: wrap dhcpcd to create dhcpcd user/group if missing; run as root if needed

• console: set getty console to 115200 vt100

config/zinit/init/network.sh

@@ -0,0 +1,7 @@
+#!/bin/sh
+set -e
+# Ensure dhcpcd user/group exist (some builds expect to drop privileges)
+if ! getent group dhcpcd >/dev/null 2>&1; then addgroup -S dhcpcd 2>/dev/null || true; fi
+if ! getent passwd dhcpcd >/dev/null 2>&1; then adduser -S -H -D -s /sbin/nologin -G dhcpcd dhcpcd 2>/dev/null || true; fi
+# Exec dhcpcd (will run as root if it cannot drop to dhcpcd user)
+exec dhcpcd ""