Change launch of anti-sat to take plane# argument

Change launch of anti-sat to take plane# argument

Before, it took a sector argument, and targeted the lowest-numbered
satellite there.  Rather inconvenient when your own satellite masks
one of the enemy's.

Moreover, the command could be abused to find all sectors with
satellites.  Now it can "only" be abused to find satellite ids, and
whether they're in range.  Still not ideal, but tolerable.