login user after registration
fixed many more notice-errors
cookielogin now requires a function call
send_mail uses new Mail-Class

Signed-off-by: Sweil <mail@sweil.de>
fixed fs code and html parsing in mail

Signed-off-by: Sweil <mail@sweil.de>
Merge branch 'alix6_neu' of github.com:Sweil/Frogsystem-2 into alix6_neu