fix/update some links

README.md

@@ -2,17 +2,17 @@
 
 [!["Buy Us A Coffee"](https://www.buymeacoffee.com/assets/img/custom_images/orange_img.png)](https://www.buymeacoffee.com/jmrenouard)
 
-[![Project Status](http://opensource.box.com/badges/active.svg)](http://opensource.box.com/badges)
+[![Project Status](https://opensource.box.com/badges/active.svg)](https://opensource.box.com/badges)
 [![Test Status](https://github.com/anuraghazra/github-readme-stats/workflows/Test/badge.svg)](https://github.com/anuraghazra/github-readme-stats/)
-[![Average time to resolve an issue](http://isitmaintained.com/badge/resolution/major/MySQLTuner-perl.svg)](http://isitmaintained.com/project/major/MySQLTuner-perl "Average time to resolve an issue")
-[![Percentage of open issues](http://isitmaintained.com/badge/open/major/MySQLTuner-perl.svg)](http://isitmaintained.com/project/major/MySQLTuner-perl "Percentage of issues still open")
+[![Average time to resolve an issue](https://isitmaintained.com/badge/resolution/major/MySQLTuner-perl.svg)](https://isitmaintained.com/project/major/MySQLTuner-perl "Average time to resolve an issue")
+[![Percentage of open issues](https://isitmaintained.com/badge/open/major/MySQLTuner-perl.svg)](https://isitmaintained.com/project/major/MySQLTuner-perl "Percentage of issues still open")
 [![GPL License](https://badges.frapsoft.com/os/gpl/gpl.png?v=103)](https://opensource.org/licenses/GPL-3.0/)
 
 **MySQLTuner** is a script written in Perl that allows you to review a MySQL installation quickly and make adjustments to increase performance and stability. The current configuration variables and status data is retrieved and presented in a brief format along with some basic performance suggestions.
 
 **MySQLTuner** supports ~300 indicators for MySQL/MariaDB/Percona Server in this latest version.
 
-**MySQLTuner** is actively maintained supporting many configurations such as [Galera Cluster](http://galeracluster.com/), [TokuDB](https://www.percona.com/software/mysql-database/percona-tokudb), [Performance schema](https://github.com/mysql/mysql-sys), Linux OS metrics, [InnoDB](http://dev.mysql.com/doc/refman/5.7/en/innodb-storage-engine.html), [MyISAM](http://dev.mysql.com/doc/refman/5.7/en/myisam-storage-engine.html), [Aria](https://mariadb.com/kb/en/mariadb/aria/), ...
+**MySQLTuner** is actively maintained supporting many configurations such as [Galera Cluster](https://galeracluster.com/), [TokuDB](https://www.percona.com/software/mysql-database/percona-tokudb), [Performance schema](https://github.com/mysql/mysql-sys), Linux OS metrics, [InnoDB](https://dev.mysql.com/doc/refman/5.7/en/innodb-storage-engine.html), [MyISAM](https://dev.mysql.com/doc/refman/5.7/en/myisam-storage-engine.html), [Aria](https://mariadb.com/docs/server/server-usage/storage-engines/aria/aria-storage-engine), ...
 
 You can find more details on these indicators here:
 [Indicators description](https://github.com/major/MySQLTuner-perl/blob/master/INTERNALS.md).
@@ -82,7 +82,7 @@ Unmaintenained stuff from MySQL or MariaDB:
 
 ***MINIMAL REQUIREMENTS***
 
-* Perl 5.6 or later (with [perl-doc](http://search.cpan.org/~dapm/perl-5.14.4/pod/perldoc.pod) package)
+* Perl 5.6 or later (with [perl-doc](https://metacpan.org/release/DAPM/perl-5.14.4/view/pod/perldoc.pod) package)
 * Unix/Linux based operating system (tested on Linux, BSD variants, and Solaris variants)
 * Unrestricted read access to the MySQL server
 OS root access recommended for MySQL < 5.1
@@ -501,7 +501,7 @@ These kinds of things are bound to happen. Here are the details I need from you
 * use option --cvefile to perform CVE checks
 
 **Question: How to use mysqltuner from a remote host?**
-Thanks to  [@rolandomysqldba](http://dba.stackexchange.com/users/877/rolandomysqldba)
+Thanks to  [@rolandomysqldba](https://dba.stackexchange.com/users/877/rolandomysqldba)
 
 * You will still have to connect like a mysql client: