Show specific error messages if user creation fails

Fix for PHP 7, more debugging output

minor grammar correction in a comment

Change from _nostring to _other
Permit three values:
- always (default), the other input field is always displayed
- exists, the other input field is only displayed when the setting
contain

Change from _nostring to _other
Permit three values:
- always (default), the other input field is always displayed
- exists, the other input field is only displayed when the setting
contains value(s) not listed in choices*.
- never, the other input field is never displayed. If the setting
contains any value(s) not listed in choices they will be
discarded on saving.
* This means, under normal circumstances the admin will not see
the other input field. It will only appear after manual editing
to enter a non-listed _choice or if an update were to remove a
previously selected _choice

show more ...

nostring accepts only on

multicheckbox without extra string input

Undefined offset, initialize as null

translation update

translation update

* Fixed identified issue with button spans by replacing missing closing span tag as identified by selfthinker, removed in ae61441.

* Changed the flow of the navigation button HTML so the navigation buttons actually flow to the right.

translation update

translation update

translation update

translation update

translation update

translation update

translation update

translation update

translation update

translation update

translation update

translation update

translation update

Create lang.php