[bitnami/moodle] Always set `$CFG->wwwroot` to HTTPS if `MOODLE_SSLPROXY` set

[vlk-charles]

Description of the change

When $CFG->sslproxy is set (set by MOODLE_SSLPROXY, although see #6534) , $CFG->wwwroot is required to start with https, otherwise Moodle refuses to serve any content except an error message. Previously, the logic generated by the moodle_configure_wwwroot function in libmoodle.sh used to determine the scheme of $CFG->wwwroot dynamically at run time based on the request.

This pull request enhances the behavior of moodle_configure_wwwroot to disable this logic when the MOODLE_SSLPROXY environment variable is set. In such case, $CFG->wwwroot is set statically to HTTPS.

Benefits

/bitnami/moodle/config.php does not need to be fixed manually after creating a new container.

Applicable issues

• fixes #6535

Additional information

Tested on bitnami/moodle:4.0.4-debian-11-r2.