- install.py: allow --mariadb-version 10.11 (with 11.8, 12.1); use --nobest for 10.11/11.8 on RHEL; accept existing 10.x
- cyberpanel.sh: prompt and --mariadb-version accept 10.11; only pass --mariadb-version if install.py supports it; fix MySQLdb check (no __version__)
- cyberpanel_upgrade.sh: accept 10.11 in --mariadb-version and prompt; Check_Root allow uid 0 when SUDO set; Branch_Check avoid double v (vv2.5.5-dev); early root check