app_front.load_config: print stack and htmlify new lines in error path
app_front.load_config: print stack and htmlify new lines in error path

Signed-off-by: Oleg Verych <a5ce24b76737c0ca6b8faa55c4f938064a1695cf@gmail.com>

olecom/supro,suprojs/supro,olecom/supro,suprojs/supro,suprojs/supro,olecom/supro