[MP] Make sure more client commands are removed on CL_Shutdown.
[MP] Merge ioquake/ioq3@90eb32c5ab01c7ee4815fd33c76fca788ff4214f
Clear referenced paks when disconnecting
After playing Team Arena, if you switch to Q3A and try to play a demo with cl_allowDownload enabled it would print "Need Paks: blah blah" and not play the demo.