AdvancedServerList

This update only affects people who use the "contains" operand in their conditions.

Previously was the pattern used <- which was taken from TAB. But a possible issue has been brought up, where a condition such as -2<-1 could be treated as -2 <- 1 when the goal was to have -2 < -1 as expression.
Because of this did I change the pattern to <_ to avoid this possible issue. So if you used <- in your conditions, switch it over to <_ to have it working.