Rename script names, add lock script

Add a user lock script to move users from ssh allow/foward group to ssh
reject group.

Rename user_create.sh script to create_user.sh script and add new ssh
allow/foward flag in user_list.txt file after group block and before
password name block

Update check last login script with better add/remove from groups

user_list.txt-sample

@@ -1 +1 @@
-#user_id;user_name;group,subgroup;override password;override hostname;override ssh type
+#user_id;user_name;group,subgroup;ssh access type;override password;override hostname;override ssh type