Don't allow underscore in jail name beginning, remove jail from bastille_list on destroy

usr/local/share/bastille/destroy.sh

@@ -1,6 +1,6 @@
 #!/bin/sh
 #
-# Copyright (c) 2018-2020, Christer Edwards <christer.edwards@gmail.com>
+# Copyright (c) 2018-2021, Christer Edwards <christer.edwards@gmail.com>
 # All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
@@ -76,6 +76,12 @@ destroy_jail() {
             rm -rf "${bastille_jail_base}"
         fi
 
+        # Remove target from bastille_list if exist
+        # Mute sysrc output here as it may be undesirable on large startup list
+        if [ -n "$(sysrc -qn bastille_list | tr -s " " "\n" | awk "/^${TARGET}$/")" ]; then
+            sysrc bastille_list-="${TARGET}" > /dev/null
+        fi
+
         ## archive jail log
         if [ -f "${bastille_jail_log}" ]; then
             mv "${bastille_jail_log}" "${bastille_jail_log}"-"$(date +%F)"