Add settings block to ssh public key in auth file, ReadMe file update

ReadMe.md

@@ -10,20 +10,64 @@ Then remove old key
 
 Store ssh key name for current period
 
+## Settings files
+
+### `settings.ini`
+
+```ini
+[Settings]
+key_age=90
+server_list=server_list.csv
+# if start with ~/ it will be replaced with $HOME
+server_pem_folder=~/folder/to/admin/pems/
+server_pem_archive_folder=~/tolder/for/archive/pems/
+```
+
+- key_age is in days, default is 90
+- server_lust is the file name where the servers and info is stored
+- server_pem_folder is the location for the PEM files, eg in a ~/.ssh/ sub folder
+- server_pem_archive_folder is thge location for the archive files, a sub folder will be created there
+
+### server_list fiel
+
+This file is semicolon ';' separated and not ',' as usual. The reason is that the authorization key settings block is comma separated
+
+- Sever: server name as to which to connect to
+- Username: the username to use to connect
+- Flag: currently not used
+- Auth Key Settings: Optional settings block for the public key entry in the auth file
+
 ## Scripts
 
-### rotate-ssh-keys.sh
+### `rotate-ssh-keys.sh`
 
 Will create a new key and deploy on the server and move the PEM part to the
 local SSH folder
 
-### remove-old-ssh-keys.sh
+Must have -g flag set to run
+
+### `remove-old-ssh-keys.sh`
 
 Will check in the previous ssh public key folder and remove this entry from the remote server
 
+Must have -g flag set to run
+
 ### Options
 
+For both rotate and remove ssh key
+
 - -h override single host name
 - -u override user name for a host
 - -f force key change
+- -c force create new key even if old key exists
 - -n dry run
+- -g flag for actual change call
+
+### `test-ssh-keys.sh`
+
+Test access to the server and print information
+
+Options are
+
+- -h override single host name
+- -u override user name for a host