check_local_webservice.sh: optional number of lines to be printed and some changes on script output.

conf/check_local_webservice.conf.sample

@@ -17,10 +17,21 @@
 # -
 LOCAL_WEBSITES_TO_CHECK=""
 
-# - LOG_FILES_TO_MONITOR
+# - LOG_FILES_TO_MONITOR[:<n>]
 # -
-# - Print out the last 20 lines from theses logfiles
+# - Print out the last lines from theses given logfiles
 # -
+# - its possible to give a number of lines, which should be printed out 
+# - by appending it seperated ba a colon ':'.
+# -
+# - The default number of printed out lines is 20.
+#
+# - Example:
+# -    LOG_FILES_TO_MONITOR="
+# -       /var/log/apache2/ip_requests.log:40
+# -       /var/log/php-7.4-fpm/php_errors.log
+# -      /var/log/mysql/mysql.err:15
+# -    "
 # -
 LOG_FILES_TO_MONITOR=""