Always the little things! Question is ... how/why did that happen!!! Oh, well, chaulk it up to 'hickup'.
Now about the sanitized config file ... you upgrade via directions that tells you to copy the backup of config.php into new code.
Yes, they tell ya that ... but don't remind there are probably some new stuff you want to look at ... so let's begin the journey into the DB of a 3.9.x and beyond. Some stuff you might not be able to do - depending upon hosting and access to DB config ...
Your config.php file:
$CFG->dboptions = array(
'dbpersist' => true, // should persistent database connections be
// used? set to 'false' for the most stable
// setting, 'true' can improve performance
// sometimes
'dbsocket' => false, // should connection via UNIX socket be used?
// if you set it to 'true' or custom path
// here set dbhost to 'localhost',
// (please note mysql is always using socket
// if dbhost is 'localhost' - if you need
// local port connection use '127.0.0.1')
'dbport' => '', // the TCP port number to use when connecting
// to the server. keep empty string for the
// default port
Do an Environment Check on your server and see what it says about DB.
Look in config-dist.php and the DB array.
Then look at:
https://docs.moodle.org/39/en/MySQL
and from a 3.9.2 git acquired code, clip from config-dist.php - DB array:
'dbcollation' => 'utf8mb4_unicode_ci', // MySQL has partial and full UTF-8
// support. If you wish to use partial UTF-8
// (three bytes) then set this option to
// 'utf8_unicode_ci', otherwise this option
// can be removed for MySQL (by default it will
// use 'utf8mb4_unicode_ci'. This option should
// be removed for all other databases.
All this to warn if you have errors that kinda hint at text, could be related to above.
Remember, we aren't in Kansas anymore!
'Stiff drinks' ... yeah, I remember thinking the same thing ... but on nights where I could not resist, did notice I could tolerate a lot more the following day (only a JH/HS classroom teacher might understand that!). Can only imagine what it's like with Zoom! :|
Hang in there! Have a GREAT Year!
Anyway ... all is well that ends well!
'SoS', Ken