+Plus and bonuses duration, can now be decreased or resetted, by
inserting a negative value of days
+Artifacts and artifacts villages created on a user account, won't
contain any troops
+Some clean up
Some installations seem to support localhost:port for 1st parameter of
mysqli_connect(), others will only support the official parameters with
port towards the end. This fix tries them both - first the official one,
then the localhost:port one.
Also, there were a lot of mysqli_connect()'s inside Admin mods. These
now also use the central Database class.
Catalin Novgorodschi