Security fixes across multiple files:
- install.func: Quote command substitutions in mkdir/systemctl to prevent
word splitting and globbing on GETTY_OVERRIDE path
- build.func: Escape sed special chars (& \) in current_os/hostname/ip
before using them as sed replacement strings in update_motd_ip
- build.func: Escape regex metacharacters (. |) in $LANG before sed use
- build.func: Validate render_gid/video_gid as numeric before sed injection
- build.func: Use HTTPS for Alpine APK repositories instead of HTTP
- tools.func: Verify GPG dearmor output is non-empty (-s check)
- tools.func: Tighten GPU device permissions from 666 to 660 (owner+group)
- tools.func: Add chgrp render for /dev/kfd (AMD ROCm)
- shinobi-install.sh: chmod 777 -> 644 on version.json
- tasmoadmin-install.sh: chmod 777 -> 775 on tmp/data directories
- runtipi.sh: chmod 666 -> 660 on settings.json
* improve error handling to show more details
* improve the way it checks for root password
* consistant getty_override
* streamline verbose mode
* remove v4 scripts
* small tweaks
