Update create/delete scripts, add rename script

rename user script added: renames user, home dir and connected files.

delete script fix with remove of not needed options (-g)

Update all scripts to exit only after all errors are shown, unless it
is a critical run error.

Readme.md

@@ -256,3 +256,22 @@ The script can be put into the crontab and run once a month, it prints to STDOUT
 ```crontab
 0 2 1 * * root /root/users/bin/check_last_login.sh | mail -s "User Account check: $(hostname)"
 ```
+
+## Delete users
+
+`bin/delete_user.sh -t -b <user 1> <user 2> ...`
+
+Deletes one or more users
+
+- `-t` test, no action done
+- `-b` do not create a backup
+
+Unless `-b` is set the home folder and public key in /etc/ssh will be backed up.
+Flags user with #DELETED-YYYYMMDD_HHmmss:id;... in the user_list.txt file
+
+## Rename user
+
+`bin/rename_user.sh -t -o <current user name> -n <new user name>`
+
+Renames a user including the home directory, public key files and any other connected data.
+Also updates the user_list.txt