found for a authentication method.

an authentication configuration form for each plugin.
Use redirect() instead of header() and exit.
Use helper function to call a static method when we have the class name in
a variable.
Some better commenting for the login related form functions.

informational or fatal.

authentication method exporting a list of configuration options that they
can validate, and that are saved automatically.

installed_$plugintype instead of config_$plugintype. lots of changes to
support this. new plugin_types function too

Whitespace cleanup.

Call new plugin_types function to get a list of all plugin types.
Fix including of plugin language files.
Whitespace changes.

cases.

in a transaction (however MySQL doesn't support DDL in transactions...).

Fixed load_config to check for value set in the config file instead of the
database properly.

Added a couple of XMLDB helper functions to prevent fatal errors and enable
logging.

the usr table.

option and a default root user.

how to improve it.

upgrades.

list of plugin types for upgrades.

Fixed set_config to global $CFG so that the config option will be set
properly, and fixed set_config_plugin to use $table properly.

so it can be plainly seen.

although they may be removed.

Check for whether the system is actually installed instead of checking for
if the version is available, which allows the install to proceed without
the user being bothered by pesky details such as having to log in when no
accounts are available.

Get the auth script from the new location, which will change to
safe_require when I get hold of it.