feature(LOGWATCH): Update logwatch scripts

- add trailing newlines
- update search phrases to match logfile output

etc/logwatch/conf/logfiles/backup.conf

@@ -11,4 +11,4 @@ Archive = /path/to/your/logfile.ext.?.gz
 # You don't need to change this unless you have altered the 'stamp' variable in
 # the script in which case you will want to update the regex in the custom pl
 # script below
-*sqFullStampAnywhere
+*sqFullStampAnywhere

etc/logwatch/conf/services/backup.conf

@@ -6,4 +6,4 @@ Title = "System and Mailcow Backup"
 
 # Override the detail level for this service
 # Remember the levels are: 0, 1-4, 5, 6+
-# Detail = 0
+# Detail = 0