Get and set maximum number of seconds that the server will permit
an external command to execute.
object.ExecTime [ = seconds ]
The ExecTime property specifies the maximum number of
seconds that an external program is permitted to run on the server.
External programs are registered using the RegisterProgram
method, and are executed by the client sending the SITE EXEC command
to the server. If this value is zero, the default timeout period of 5
seconds will be used. The minimum execution time is 1 second and the
maximum time limit is 30 seconds.