MYSQLI: Max_user_connections are exceeded

[moan0s]

in #27c455f ILMO apperently opens too many mysqli connections on some hosts (simple webhosting package on one.com). Therefore it fails upon login. On a test server this is not the case.
Reproduction: Maybe limit the number of mysqli connections on the test server?

Warning: mysqli::__construct(): (HY000/1203): User fs_medtech_de already
has more than 'max_user_connections' active connections in
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php on line 84
Warning: mysqli::set_charset(): Couldn't fetch mysqli in
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php on line 85
Datenbank nicht erreichbar: (1203) User fs_medtech_de already has more
than 'max_user_connections' active connections Warning: mysqli::query():
Couldn't fetch mysqli in
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php on line 171
Fatal error: Uncaught Error: Call to a member function fetch_array() on
bool in /customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php:172
Stack trace: #0
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(11):
Data->em_check_database() #1
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(266):
Data->__construct() #2
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(139):
Data->em_get_user('MAIL', 'PW', 'redacted...') #3
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(22):
Data->set_session('strt') #4
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(266):
Data->__construct() #5
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(139):
Data->em_get_user('MAIL', 'PW', 'b4992da8d377d9d...') #6
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(22):
Data->set_session('strt') #7
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php(266):
Data->__construct() #8 /customers/4/3/0/fs-medtech.de/ht in
/customers/4/3/0/fs-medtech.de/httpd.www/bib/class/class.php on line 172

[moan0s]

Not fixed. Testing with the live database revealed that there are ~20 db connections made upon login which is a hint, that every E-mail that will be send triggers a new database connection to be made. As on our test systems no mails are sent we coulnd'nt find this there.
This is most likely due to the composition of E-Mails that queries user information

ILMO/class/class.php

Lines 997 to 999 in 803f41b

	function send_reminder($aRow){
	$oUser = new User;

[moan0s]

Could be solved with the rewrite of the class structure f87ab1f, needs testing