[1] Quiet some prolific debug output in cirrus driver.
[2] Stop SIGILLs when running GL clients on systems with SSE but no
CPU_ENABLE_SSE in the kernel.
[3] Fix imake complaints after XFree86-4-libraries patch to stop libXThrStub
build on post-500043 -current.
PR: [1] 38590
Approved by: portmgr