Thanks for responding! I know the web-based installation of upgrade procedure for plug-ins. I am thinking of many sites, like the OP, and was looking for a "magic" command, git being the obvious, to update the code. That will kick the web-based Moodle upgrade procedure and update the database.
Since there is the possibility that this being not what OP is looking for I added a new post to my thread (rather than hijacking this thread). Would appreciate if you (or anybody else) could shed some light in to this. It is here: https://moodle.org/mod/forum/discuss.php?d=396476#p1604043.